Answer:
Genetic drift
Explanation:
Genetic drift is a change in genetic allele frequencies of a population. Bottleneck effect, caused by disasters such as in this case, causes genetic drift in a very rapid way hence reducing variability in a population. Reduced genetic variability in a small population is especially threatening because the chances of population surviving environmental changes get slimmer. This is because natural selection acts of genetic variability to get a population to adapt to changes in the environment.
The flash flood caused a bottleneck effect on the population, reducing its size and altering allele frequencies due to genetic drift, which may result in a different genetic equilibrium with potentially less genetic diversity.
The flash flood that reduced a population from 200 to 100 organisms would have a significant effect on the population's genetic distribution and equilibrium, particularly if it left 16 homozygous recessive individuals. This scenario illustrates the consequences of a bottleneck effect, where a large reduction in population size and subsequent genetic drift can drastically alter allele frequencies. Natural disasters, like flash floods, typically reduce population sizes without regard to allele frequencies, but their aftermath can result in some alleles being lost entirely while others may become more prevalent. Given that the survivors represent a random sample of the original population, the new genetic makeup will be subject to genetic drift, which can further reduce genetic diversity especially in small and isolated populations.
Since the homozygous recessive individuals (16 out of 100) survived, they will contribute disproportionately to the gene pool of subsequent generations compared to their initial frequency before the flood. The impact of the flash flood on the population distribution/equilibrium can be understood as an increase in the frequency of the homozygous recessive genotype, which may be different from the pre-flood equilibrium. The extent of this effect would depend on the genetic structure of the original population and the specific alleles carried by the surviving organisms.
Sb-50 on a recreational boat, the location of emergency equipment (life jackets, fire extinguishers, visual distress signals, radio, etc.) should be reviewed before departure with which persons?
Answer: Everyone aboard
Explanation:
Answer:
Every person on the board
Explanation:
While going for boating for any purpose either recreational or work, all the individuals on the boat are required to have the access to following safety gears as per the norms of U.S. Coast Guard.
1. There must be access to life jackets/ flotation devices to each and every member on the board
2. Every member on the board must be aware of location and usage of fire extinguishers in times of emergency
3. Likewise visual and sound signaling devices must be accessible to everyone.
If individuals at one end of the curve have a higher fitness,what is it called?
A.stabilizing selection
B.disruptive selection
C.directional selection
Answer:
C. directional selection
Explanation:
If individuals at one end of the curve have a higher fitness, it is called directional selection.
One function of the poly-A tail on eukaryotic mRNA sequences is to help the mRNA be transported from the nucleus to the cytoplasm. Prokaryotic mRNA also has a poly-A tail. Choose the best explanation of the prokaryotic poly-A tail.
A. Prokaryotic poly-A tails have the same functions as eukaryotic poly-A tails, because this process is highly conserved throughout different species.
B. Prokaryotic poly-A tails are composed of a different molecular structure compared with eukaryotic poly-A tails.
C. Prokaryotic poly-A tails have other functions, because prokaryotes don't have nuclei.
D. Prokaryotic poly-A tails aren't important, because prokaryotes don't have nuclei.
Answer:
C. Prokaryotic poly-A tails have other functions, because prokaryotes don't have nuclei.
Explanation:
In eukaryotes, the poly-A tails help in import of mRNA from cytosol to nucleus with the help of proteins named as importins and then export of mRNA from nucleus to cytosol with the help of proteins named as exportins. In prokaryotes they serve the function of mRNA degradation instead. In prokaryotes, mRNA doesn't need to be imported and exported because they do not have a well defined double membranous organelle named as nucleus. All of their genetic material lies in the cytosol in the form of nucleoid.
In eukaryotes, poly-A tails serve many other functions apart from export and import like it imparts stability to mRNA, facilitates degradation of mRNA and increases translation efficiency by helping in circularization.
A quaternary consumer species would be expected to have a smaller population than a secondary consumer species. Please select the best answer from the choices provided T F
A quaternary consumer species would be expected to have a smaller population than a secondary consumer species is true.
What is a quaternary consumer?Quaternary consumers are usually top predators within the environment, and they eat the tertiary consumers.
Examples of quaternary consumers contains lions, wolves, polar bears, humans, and hawks.
Organisms may work under various roles, such as a bear that eats fish but also berries.
Thus, this statement is true, Quaternary consumers are usually top predators within the environment.
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A population of animals is split in half by a river. Before speciation is
completed the two halves are rejoined when a drought causes the river to run
dry. How would this impact the two populations?
O
A
The two halves would be reproductively isolated.
O
B Speciation would still occur, because the two halves would be too
different genetically to interbreed.
O
G Individuals could now freely mate, and gene flow would increase.
O
R. Traits that had developed through mutation would still exist only
in one of the halves
An impact of rejoining the two halves of animals before speciation is completed is that: C. individuals could now freely mate, and gene flow would increase.
What is speciation?Speciation can be defined as an ecological and biological process through which new species of a living organism are formed, especially due to isolation of a part.
Based on genetics, an impact of rejoining the two halves of animals before the completion of speciation is that each of them can now freely mate, and gene flow between the species would increase.
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When elongated, tube-shaped cells from the lining of the intestine are treated with a certain chemical, the cells sag and become rounded. The internal structures disrupted by this chemical are probably __________.View Available Hint(s)When elongated, tube-shaped cells from the lining of the intestine are treated with a certain chemical, the cells sag and become rounded. The internal structures disrupted by this chemical are probably __________.rough endoplasmic reticulummitochondriacell junctionsmicrotubules
Answer:
Microtubules
Explanation:
These filament-like structures are a major component of the cytoskeleton of the cell and help is maintain asymmetrical cell shape. They are composed of tubulin molecules arranged to form a 'hollow straw' attached to the cell membrane end to end . The contraction and lengthening of these microtubules are controlled by the addition of removal these of tubulin molecules to vary its length.
In the case of elongated, tube-shaped cells from the lining of the intestine sagging and becoming rounded after treatment with a certain chemical, the internal structures likely disrupted are the microtubules. These structures are part of the cell's cytoskeleton and help maintain its shape, particularly in the case of columnar epithelial cells.
Explanation:When elongated, tube-shaped cells from the lining of the intestine are treated with a certain chemical, the cells sag and become rounded. The internal structures disrupted by this chemical are probably microtubules.
Microtubules are part of the cytoskeleton of a cell, helping to maintain its shape and also serving crucial roles in intracellular transport and cell division. If they are disrupted, the cell can lose its form, leading to a rounded shape. The elongated, tube-shaped cells in the lining of the intestine, also known as columnar epithelial cells, have a stack of microtubules that maintain their elongated shape. Thus, a chemical treatment that disrupts the microtubules would cause the cells to lose their elongated form and become rounded.
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Which small piece of a DNA molecule contains no base pairing errors?
A. TCT GA
AGA GC
B. TCT CG
AGA GC
C. TCT CG
AGA CG
D. TCT CG
ATG GC
Answer:
The answer is B
Explanation:
The small piece of a DNA molecule contains no base pairing errors:
T goes with A __ C goes with G __ G goes with C
B. TCTCG
AGAGC
TCT CG
AGA GC
contains no base-pairing errors.
What is base pairing?Adenine (A), thymine (T), guanine (G), and cytosine (C), according to the Watson-Crick base pairing, which is the basis for the helical structure of double-stranded DNA. Inside the DNA molecule, A only interacts with T, and C only interacts with G. Thymine is swapped out for uracil (U) in RNA.Thus, we can conclude that option B is correct.
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what do we call the process used to create a glofish?
A.agriculture
B.sexual reproduction
C.genetic engineering
D.asexual reproduction
What is the term for the layers of bony matrix surrounding the vessels and nerve?
Explanation:
Each osteon consists of lamellae, layers of compact matrix surround a central canal (the haversian or osteonic canal) which contains the bone's blood vessels and the nerve Fibre. Osteon in compact bone tissue are aligned in the same direction along lines of stress, helping the bone resist bending or fracturing.
Hope it's helpful...
The layers of bony matrix surrounding the vessels and nerve are called lamellae which are part of the structure of osteons in compact bone. The bone is covered by periosteum membrane externally, and internally by the endosteum lining the medullary cavity.
Explanation:The term for the layers of bony matrix, or compact bone, that surround the vessels and nerve is called lamellae. Compact bone is organized into cylindrical structures known as osteons or Haversian systems. These osteons are composed of lamellae which are layered around a central canal, the Haversian canal. The Haversian canal contains the bone's blood vessels and nerve fibers. Osteocytes the cells of mature bone, occupy small cavities known as lacunae, found between the lamellae.
The outer surface of the bone is enveloped by a membrane known as the periosteum which contains blood vessels, nerves, and lymph vessels that nourish the compact bone. Tendons and ligaments are also attached to the bones at the periosteum. Within the bone the medullary cavity is lined with the endosteum where bone growth, repair, and remodeling occur.
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_____ mutations affect only the individual in which they occur; _____ mutations are passed from parent to offspring.
A series of steps that guide scientist to investigate questions about a natural world
Answer:
Scientific method
Explanation:
The scientific method is a systematic process used by scientists to explore observations, formulate hypotheses, and conduct experiments to investigate questions about the natural world. This method includes steps such as observation, hypothesis formation, experimentation, and analysis of results. It is adaptable and applicable to many fields of study.
A series of steps that guide scientists to investigate questions about the natural world is known as the scientific method. This process is integral to the way scientists explore observations, develop hypotheses, and conduct experiments. It typically begins with an observation that leads to a question. Following this, scientists engage in background research to frame a hypothesis, which is then rigorously tested through experimentation. After data collection, the results are analyzed, leading to conclusions that can either support or refute the hypothesis. Importantly, the scientific method is adaptable and can be applied beyond traditional scientific disciplines, embodying a standardized approach to problem-solving and inquiry.
AS MUCH INFORMATION ABOUT SMOKING AND PASSIVE SMOKING AS POSSIBLE WITH STATISTICS AND WHAT EFFECT IT HAS ON THE WORLD GLOBALLY
WILL BE GIVING BRAINLIEST
Answer:
there is a good and bad effect on the world, the positive reason being economically. smoking is a great money maker it was worth US$88 billion dollars in 2018. the negative reason is the pollution and what it does to the human body such as cancer
Explanation:
Which of the following will NOT cause mass extinction?
A. Drastic change is weather
B. Geological change
C. Both a and b
D. None of the above
Answer:
D. None of the above
Explanation:
Reason that Drastic Change in weather may cause mass extinction
Weather plays an important role in the survivability & the growth/diminish of the population. For example, animals that need large amounts/bodies of water (for example fishes), will not survive when the area is hit with a heat wave & drought, which would cause fishes to surface, and die.
Reason that Geological change would play a large role in mass extinctions
While the Geography is constantly changing, large abrupt changes would cause a upheaval and may upset the population, leading to a depletion of resources or even a sudden destruction of part/all of the population. For example, an earthquake may kill large amounts of animals, and the destruction of the greenery in the area may severely limit the amount of food/decrease the primary consumer's populations, leading to a starvation.
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Staining is an important way to improve what aspects of microscopy?
Answer:
Staining is an important way to improve RESOLUTION AND CONTRAST.
Explanation:
Microscopy refers to the use of microscope. Microscope is a scientific optical instrument that is normally used to achieve in depth study of invisible and very tiny objects. There are many techniques in microscopy, these techniques are use to improve the type of view produce by the microscope.
Staining is one of the techniques that are used in microscopy. It involves adding color to the objects that one wants to view under the microscope. Both living and non living objects can be stained. The major reason for staining is to improve the visualization of the stained object under the microscope. The staining is done in such a way that different important structures will be highlighted.
There are two types of staining, they are simple and differential staining.
Staining enhances contrast and visibility of microscopic specimens, allowing for better observation of cellular structures. It is vital in overcoming light microscopy's limitations in resolution and helps differentiate cell types. Mastery of staining techniques ensures clear and useful microscopic images.
Staining is a fundamental technique in microscopy that significantly enhances the visibility of microscopic specimens. By creating a contrast between the organism and its background, staining allows for better observation and analysis of various cellular structures, sizes, and arrangements. Utilizing stains or dyes can also overcome limitations associated with resolution and contrast in light microscopy. When specimens are properly fixed and stained, they reveal detailed information on cell morphology and can be differentiated according to their unique chemical compositions. Mastery of staining techniques and knowledge of which stains are best suited for each specimen type are crucial for obtaining clear, useful images in microscopy.
For instance, basic staining requires the use of a single dye applied directly to the specimen (direct stain) or used to stain the surrounding area (negative stain), giving a clear image of microbial characteristics. More complex differential staining techniques can be used to differentiate between cell types or cell components and provide further insights into their structures.
Overall, the application of staining techniques in microscopy is vital for achieving the necessary contrast to visualize minute details of microbes and cells. A well-executed stain is critical for proper specimen examination and interpretation in fields such as microbiology and histology.
Are a type of lipid that consists of fatty acids combined with alcohols or other
Final answer:
Lipids are a diverse group of organic molecules including triglycerides, which consist of glycerol bonded to three fatty acids. Triglycerides are the main component of body fat and can contain either saturated or unsaturated fatty acids. Other lipid types include phospholipids and steroids, all vital to organism function.
Explanation:
Lipids are a diverse group of organic compounds that are insoluble in water but soluble in organic solvents. They play vital roles in living organisms and include substances like fats, oils, waxes, and steroids. One common type of lipid is the triglyceride, which is formed when a glycerol molecule combines with three fatty acid molecules. Glycerol is a sugar alcohol, a simple, sweet-tasting, non-toxic compound that is colorless and odorless.
Triglycerides are the primary constituent of body fat in humans and animals, and can also be found in plant-derived fats. They are important for storing energy and providing insulation. Triglycerides come in many varieties but can be broadly categorized into two types based on the fatty acids they contain: those with saturated fatty acids and those with unsaturated fatty acids. The unsaturated ones are commonly found in plant products and are associated with health benefits.
Other types of lipids include phospholipids and steroids, each of which has unique functions in the body. Phospholipids are essential components of cell membranes, while steroids, like cholesterol, serve as precursors to important hormones and have structural roles in cells.
9. Chargaff's rule states that the amounts of guanine and cytosine are roughly the same, and the amounts of adenine and thymine are roughly the same
A. in eukaryotes only. The rule doesn't apply to prokaryotes
B. except in species that use uracil in place of thymine in their DNA
C. but the relative amounts of G+C and A+T vary by species.
D. and the relative amounts of G+C and A+T don't vary by species.
Answer:
C. but the relative amounts of G+C and A+T vary by species.
According to Chargaff's rule guanine and cytosine are roughly same and the amount of adenine and thymine are also roughly same but the relative amounts of G+C and A+T vary by species.
Chargaff Rule:-The rule that in DNA there is always equality in quantity between the bases Adenine and Thymine and between bases Guanine and Cytosine. The second rule states that the amount of cytosine, guanine, adenine and thymine vary from species to species.
Therefore, option (c) is the correct answer.
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The five-carbon sugar in RNA is called
Answer:
Ribose sugar
Explanation:
This sugar is differentiated from deoxyribose sugar of DNA by the 2’ carbon of the carbon ring. This carbon in ribose has a hydroxyl group while that of deoxyribose sugar does not. When this ribose sugar is bonded with a nitrogenous base on the 1’ carbon and a phosphate on the 5' carbon, it becomes a ribonucleoside that is the basic unit of RNA.
The five-carbon sugar in RNA is called ribose. This sugar differs from the deoxyribose found in DNA by having a hydroxyl group on the 2' carbon. The ribose sugar, along with a nitrogenous base, contributes to the structure of RNA nucleotides which, unlike DNA, are single-stranded.
Explanation:The five-carbon sugar in RNA is called ribose. The ribose sugar in RNA differs from the deoxyribose sugar in DNA in that ribose contains a hydroxyl group on the 2' carbon. Furthermore, the carbon atoms of this sugar molecule in RNA are numbered as 1', 2', 3', 4', and 5' (with 1' being read as 'one prime').
The phosphate component of RNA connects to the 5' carbon of the sugar via the formation of an ester linkage. This linkage involves an ester, which is an acid + an alcohol composed of the phosphoric acid and the 5'-OH group. The 2' carbon of ribose also contains a hydroxyl group. Moreover, the nitrogenous base in a nucleotide is attached to the 1' carbon of the sugar.
Structure of Ribonucleotides in RNARNA nucleotides are essentially ribonucleotides, with ribose as the pentose sugar component and a nitrogenous base. These ribonucleotides form a single strand, with bases studded along the sugar-phosphate backbone. This single-stranded structure is what separates RNA from DNA, which typically exists as a double helix.
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Which is the central element for all living things?
The central element for all living things is Carbon.
What is Carbon?The element Carbon is the basis of all human life. The word carbon in English is derived from the Latin name for burnt wood, carbo. It is denoted in the periodic table with the symbol C. It is the 4th most abundant element in the universe after hydrogen, helium, and oxygen, and the second-most in the human body after oxygen.The reason carbon is the basic element of life is the carbon’s ability to form stable bonds with many elements, including itself. This property allows carbon to form a huge variety of very large and complex molecules.The chemical symbol for Carbon is C. It is nonmetallic and tetravalent-making four electrons available to form covalent chemical bonds. Carbon is one of the few elements known since antiquity.To know more about carbon, refer to: https://brainly.com/question/27929718
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Which tube-feeding delivery method is most likely to cause dumping syndrome?
a. Intermittent feedings
b. Bolus feedings infused into the small intestines
c. Bolus feedings infused into the stomach
d. Continuous drip feedings
Answer:
I think it's intestines
Explanation:
Answer:
c. Bolus feedings infused into the stomach
Which of these can be found in both gymnosperms and angiosperms? Vascular tissue and enclosed seeds vascular tissue and seeds flowers and vascular tissue enclosed seeds and flowers
Answer:
B) vascular tissue and seeds.
Explanation:
Both gymnosperms and angiosperms have vascular tissue that is specialized for transport of minerals, water, and organic compounds.
Both gymnosperms and angiosperms have seeds. The only difference is that angiosperms have seeds hidden in the fruit, while gymnosperms have seeds on the surface.
gymnosperms and angiosperms have vascular tissue and seeds. Thus option B is correct.
What is the difference between gymnosperms and angiosperms?The angiosperms are vascular plants with seed containing fruits and it flower which have reproductive organs and fruits.
The Gymnosperms are the plant which have the seeds on the sporophylls directly without cover.
The lifecycle of angiosperm plants is seasonal but gymnosperm are evergreen in nature.
Angiosperm plants have unisexual or bisexual flowers while gymnosperm have cones and are unisexual.
In angiosperm the reproduction is animal dependent where as in in gymnosperm reproduction is wind dependent for spread.
Angiosperm have triploid tissue but gymnosperm have have haploid tissue.
In angiosperm the shape of the leaves are flat where as in gymnosperm plant the leaves are scale-like and needle-like.
Angiosperm plant products are used for Medications, food, clothing where as gymnosperm plant product are used for Paper, Lumber, etc.
Thus option B is correct.
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Which way do the nitrogenous bases in DNA pair up? A. A and G; T and C B. A and C; T and G C. A and T; G and C D. A and A; T and T; G and G; C and C
Which of the following is not true of air masses? (Do not delete my question earth science is not an option for a subject!!)
A.) An air mass cannot transfer energy from one area to another
B.) A large mass of air takes on the temperature and humidity characteristics of the land or water under it
C.) And Air mass redistributes energy by moving from place to place
Answer:
A.) An air mass cannot transfer energy from one area to another
Explanation:
The air masses are constantly on the move. They can be warm and moist, or cold and dry, as well as hot and dry, all depending on the place above which they have formed. The air masses that form over warm, large bodies of water and warm and moist. The air masses that form over cold regions are cold and dry, and the air masses that form deeper into the continent in hot regions, are hot and dry. Because the air masses are constantly on the move, they manage to transfer their energy from one area to another, resulting in change of weather conditions as the energy is transferred.
The statement that an air mass cannot transfer energy from one area to another is not true. Air masses can and do transfer energy in ways such as conduction or radiation. The other choices accurately describe the properties of air masses.
Explanation:The following statement is not true of air masses: A.) An air mass cannot transfer energy from one area to another.
Air masses have the ability to transfer energy from one area to another in two ways: Via radiation or conduction. For instance, warm air masses can move and transfer heat to cooler areas, thus transferring energy.
Moreover, options B and C: A large mass of air takes on the temperature and humidity characteristics of the land or water under it and an Air mass redistributes energy by moving from place to place respectively, are both true descriptions of the properties of air masses.
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PLEASE HELP ME WHY PEOPLE SMOKE?
Answer:
In my opinion, people smoke because they're "crazy" and need some "help."
They smoke maybe because the cigar is "good" or something...
Biogeochemical cycles are crucial to ecosystem function because _____.
Answer:
The correct option is B.
Explanation:
The options attached to the question are given below:
A. They keep the planet warm enough for living things to survive
B. Nutrients and other life-sustaining molecules are in limited supply and must be continually recycled
C. Energy flows through ecosystems in one direction only and is eventually dissipated as heat
D. They remove poisons and keep them locked up in "sinks"
Biogeochemical cycles refers to the pathways by which chemical substances move through the abiotic and biotic segments of the earth. The most important biogeochemical cycles include: carbon, nitrogen, phosphorus, oxygen and water cycles. Biogeochemical cycles transport and store important substances so that they can be available for the use of living organisms.
Biogeochemical cycles are very crucial to living organisms because they help to recycle nutrients and other life sustaining molecules, which are in limited supply and which must be continuously recycled.
Biogeochemical cycles are crucial to ecosystem function because they involve the recycling of essential elements between living organisms and their nonliving environment. Understanding these cycles is important for the health of the Earth and its ecosystems. Human activities that disrupt these cycles can damage ecosystems and potentially cause global climate change.
Explanation:Biogeochemical cycles are crucial to ecosystem function because they involve the recycling of essential elements between living organisms and their nonliving environment.
These cycles, such as the water, carbon, nitrogen, phosphorus, and sulfur cycles, have major impacts on ecosystem structure and function.For example, the movement of water is critical for the leaching of nitrogen and phosphate into rivers, lakes, and oceans.
Furthermore, the ocean itself is a major reservoir for carbon. Mineral nutrients are cycled through the entire biosphere, from one living organism to another, and between the biotic and abiotic world.Understanding these cycles is important for the health of the Earth and its ecosystems. Human activities that disrupt these cycles, such as pollution and oil spills, can damage ecosystems and potentially cause global climate change. By protecting and preserving these biogeochemical cycles, we can help maintain a healthy environment.Learn more about Importance of Biogeochemical Cycles in Ecosystems here:https://brainly.com/question/31621334
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Identify the phrase that best describes a transfer of energy between the hydrosphere and the atmosphere.
1)Ocean currents transport warm water from the equator to the poles and cold water from the poles to the tropics.
2)These currents help regulate air temperatures and, therefore, the global climate, counteracting the uneven distribution of solar radiation reaching Earth.
3)If there were no currents, the temperature near the equator would be extremely hot, and the temperature near the poles would be extremely cold.
4)These areas would not be suitable for living things to survive.
Answer:
2) These currents help regulate air temperatures and, therefore, the global climate, counteracting the uneven distribution of solar radiation reaching Earth
Explanation:
The ocean currents are part of the hydrosphere. They receive warmth from the sunlight. They warm up at the lower latitudes, and cool off at the higher latitudes. The ocean currents are in constant movement though, and they warm up the higher latitudes, and cool down the lower latitudes. The warming up and cooling off of the temperatures goes through the radiation of energy from the ocean currents. That radiation goes to the air masses, thus there is a transfer of energy from the hydrosphere tot he atmosphere. This transfer of energy between these two spheres helps to balance and modify the climate around the globe.
The phrase that best describes a transfer of energy between the hydrosphere and the atmosphere is:
1) Ocean currents transport warm water from the equator to the poles and cold water from the poles to the tropics.
Option 1) "Ocean currents transport warm water from the equator to the poles and cold water from the poles to the tropics." best describes a transfer of energy between the hydrosphere and the atmosphere. Ocean currents play a crucial role in redistributing heat energy around the globe. Warm currents carry heat from the equator towards the poles, while cold currents transport cold water from the poles towards the tropics. This movement of water helps regulate air temperatures, influencing the climate on both regional and global scales. By transferring heat energy between the hydrosphere and the atmosphere, ocean currents play a significant role in shaping weather patterns and maintaining the Earth's overall climate balance.
Which of the following mutations would likely be most dangerous to a cell?A. Deletion of one nucleotideB. Deletion of three nucleotidesC. Substitution of one nucleotide for another
Answer:
A
Explanation:
The reason the deletion of a nucleotide can be a lethal mutation is that it causes a frameshift mutation. This is due to teh fact that the codon sequence on the DNA is shifted by a single nucleotide. Therefore, the codons will read differently downstream from the place the deletion happened. The amino acids coded for by these codons will change too. The translated proteins will be defective and the organisms will be adversely affected, phenotypically.
The most dangerous mutation to a cell among the given choices would be the deletion of one nucleotide. This could result in a frameshift mutation, which can change every subsequent codon and potentially lead to a non-functional protein.
Explanation:In the context of mutations and their potential harm to a cell, between the options of deletion of one nucleotide, deletion of three nucleotides, or substitution of one nucleotide for another, the most dangerous would likely be the deletion of one nucleotide.
Mutations including deletions or insertions can cause a frameshift mutation if the number of nucleotides added or deleted is not a multiple of three. For each set of three nucleotides, called a codon, corresponds to a single amino acid. A deletion of one nucleotide would shift the reading frame, potentially changing every subsequent codon and thus every subsequent amino acid in the sequence. This can result in a non-functional protein, and therefore, have significant detrimental effects on the cell.
In contrast, the deletion of three nucleotides (a complete codon), would only result in the loss of a single amino acid in the produced protein, which may or may not significantly impact the function of the protein. Similarly, while a substitution could potentially alter the amino acid specified by the affected codon, this is less deleterious than a frameshift mutation.
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The physical characteristics of an organism are its a. genetics b. heredity c. phenotype d. genotype
The physical characteristics of an organism are known as its phenotype, which is determined by its genotype and the interaction with its environment. Genetics is the study of these features, while heredity refers to the passing on of these genetic traits. The physical characteristics of an organism are its c
Explanation:The physical characteristics of an organism are its c. phenotype. The term 'phenotype' refers to the observable physical properties of an organism. These could include traits like color, shape, size, and behavior, among others. These characteristics are determined by the interaction of an organism's genotype, which is the set of genes it carries, and the environment. Genetics is the study of genes, genetic variation, and heredity in organisms. Heredity is the passing of genetic traits from parents to offspring. However, it is not the physical characteristics, but the genetic information passed on.
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What's the role of oxygen in cellular respiration? A. It accepts electrons and keeps the electron transport chain running. B. It breaks down carbon-based sugar molecules to release energy and forms carbon dioxide. C. It combines with hydrogen ions in sugar molecules to release energy and form water. D. It supplies electrons to the electron transport chain to keep it running.
Answer:
The correct answer is option B. It breaks down carbon-based sugar molecules to release energy and forms carbon dioxide.
Explanation:
Hello!
Let's solve this!
In cellular respiration, oxygen is consumed to break down glucose molecules and form ATP. ATP is the energy that we then consume.
After the explanation, we conclude that the correct answer is option B. It breaks down carbon-based sugar molecules to release energy and forms carbon dioxide.
Oxygen's role in cellular respiration is as an electron acceptor in the electron transport chain, where it combines with electrons and hydrogen ions to form water while releasing energy used to generate ATP. Without oxygen, this energy production halts.
Explanation:The role of oxygen in cellular respiration is primarily that of an electron acceptor in the electron transport chain. Hence, option A is correct. Through the process of cellular respiration, cells extract energy from nutrients and this energy is stored in ATP molecules. The final step in this process, the electron transport chain, requires oxygen. The role of oxygen is to combine with electrons and hydrogen ions to form water. This reaction releases energy that is used to form ATP. If oxygen is not present, the electron transport chain cannot function, and this halts ATP production, causing cells to run out of usable energy.
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Which system regulates and controls growth, development, and metabolism?
a. endocrine system
b. skeletal system
c. integumentary system
d. lymphatic system
Endocrine system regulates and controls growth, development, and metabolism.
Option A
Explanation :
The "endocrine system" consist of many glands which are collectively responsible for growth, development and metabolism. The hormones released from these glands controls the function of the other cells. Endocrine system forms both negative and positive feedback loops which inturn controls the release of hormones from the target cells back to the glands to stop the release of the reaction initiating hormone.
Endocrine glands are influenced with the physical factors in which the body is exposed and dealing with and releases hormone accordingly. For example due to darkness of night pineal gland releases melatonin to induce sleepiness in animals.
The endocrine system regulates and controls growth, development, and metabolism.
Explanation:The correct answer is a. endocrine system.
The endocrine system regulates and controls growth, development, and metabolism. It consists of various glands located throughout the body that produce and release hormones into the bloodstream. These hormones act as chemical messengers and help coordinate and regulate various bodily functions.
For example, the pituitary gland in the brain releases growth hormone, which is responsible for stimulating growth and development during childhood and adolescence. The thyroid gland produces hormones that regulate metabolism, while the adrenal glands produce hormones involved in the body's response to stress.
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which of the following might you use to help you make observations?
Talking, Touching, Walking, Smelling
Answer:
Touching, Smelling.
Explanation:
Touching will be useful to detect stimuli like coldness and hotness.
Smelling on the other hand will help to make observations on smell and change in smell. These two are among the five senses that we use to make observations as we record what we see, hear, touch and feel, smell and taste.
Talking, touching, walking, and smelling can all be used to make observations.
Explanation:When making observations, we use our senses to gather information. In this case, talking, touching, walking, and smelling are all methods that can be used to make observations.
For example, if you are observing a flower, you can talk about its color or smell, touch its petals to feel their texture, and walk around it to observe its shape and size.
Therefore, the correct answer is that all of the options listed can be used to make observations.
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