Answer:
1. Conjugation
2. Diploid
3. External fertilization
4. Fertilization
5. Haploid
Explanation:
Conjugation is a cell-to-cell encounter between bacteria cells. The bacteria come close to each other and DNA is then transferred through a tube-;ike structure called pilius.
The difference between diploid and haploid is that diploid organisms have chromosomes that come in pairs. The chromosomes are paired up with another chromosome that is similar in shape and size and that is why they are called homologous pairs. Haploid on the other hand do not come in pairs. In human beings for example, the egg cell and sperm cell are haploid, only having one homologous chromosome. When they join together during fertlization, they form a diploid.
Fertilization is the union of gamete cells, male and female, which result in the formation of a zygote. There are two types of fertilization, internal and external. Internal fertilization occurs when the union of the sex cells (gametes) occur inside the organism. You would see this in humans, where fertilization occurs in the womb. External fertilization occurs when the union occurs outside the organism and a good example of this would be fish. The female expels it's eggs into the water and the male would release its own sex cells as well, and they would join in the water.
Which example best represents the adhesion, cohesion, and surface tension of water?
A.
Ice forming on the surface of water bodies in winters
B.
The ability of water to dissolve many substances
C.
Water droplets forming a bead-like shape over a glass table
What word is used to describe differences of individual organisms
Answer:
Variation.
Explanation:
Variation describes differences between organisms.
The word used to describe the differences of individual organisms is 'variation'. Variation in organisms can result from genetic differences or differential gene expression, making each individual unique. The complexity of these variations contributes to the challenges in defining biological species and classifying living organisms.
Explanation:What Word Is Used to Describe Differences of Individual Organisms?
The word used to describe the differences of individual organisms is variation. These variations arise due to the unique DNA makeup of each organism, leading to a wide array of biological diversity. Every organism, including humans, exhibits variation in their genotype and phenotype, which are evident in the natural world's complexity. This is why, even among organisms classified within the same species, we observe notable diversity in physical traits, behaviors, and genetic makeup.
Understanding Variation in Biology
Variation is a fundamental concept in biology that explains the differences between individuals within the same species and between different species. These differences can be minor, like varying colorations among individuals, or significant enough to affect their physiological functions. Such variations are not only due to differences in the genetics of each organism, which could lead to conditions like sickle cell anemia, but also due to gene expression. For instance, despite having the same genetic information, two cells in an organism can function differently due to the specific genes that are active (expressed) within each cell.
Moreover, defining a species is a complex task because it involves a multitude of factors such as behavior, genetics, and morphology. While the Linnaean classification system placed organisms into hierarchical categories based on shared traits, the concept of a species has evolved to account for the underlying genetic and phenotypic variations that are emblematic of life's evolutionary history.
what is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell?
A. Passive transport
B.Diffusion
C. Endocytosis
D. Exocytosis
Answer: C. Endocytosis
Answer:
Answer:
Endocytosis.
Explanation:
In endocytosis, the cell membrane forms a cup-like sac around the molecule, the two lips of the cup meet around the molecule so that a vesicle is formed by the separation of that part of the cell membrane.
Answer:
c
Explanation:
endocytosis
Gene therapy is a form of
Answer:
is an experimental technique that uses genes to treat or prevent disease.
Explanation:
Answer:
Gene therapy is a form of Genetic Engineering
hope this helped :)
During the Carboniferous Period, what were largely responsible for regulating the climate on land masses? A. Land masses B. The glaciers C. The North and South Poles D. Large oceans
Answer:
D. Large oceans
Explanation:
During the Carboniferous period, the majority of the land masses were merged into one large supercontinent, with smaller landmasses being very close to it. This meant that there was one enormous ocean surrounding the supercontinent, but also one smaller one that was getting deeper into the land masses. The large Panthalassic Ocean had huge effect on the climate on Earth in this period. Because it was so large, it produced very large air masses, mostly warm and wet, causing a lot of precipitation, resulting in warm and wet climate in most of the planet. It was also an ocean that was capable of producing storms and waves much larger than anything we can see nowadays, managing to cause lot of damage along the coastlines of the supercontinent.
During the Carboniferous Period, glaciations and the formation of Pangaea played a major role in regulating the climate on land masses. The drier and cooler conditions led to significant ecological and evolutionary changes in plants and animals. The correct option is B.
During the Carboniferous Period, the climate on land masses was largely regulated by glaciations and the resulting cooler global climate. Towards the end of the Carboniferous, a trend toward a drier climate with evidence of glaciation and lowered sea levels is observed. These changes had significant impacts on the distribution and evolution of plant and animal life, favouring adaptations for drier conditions such as xerophytic leaves in gymnosperms and the development of eggs that could survive outside of water for vertebrates.
The development of a single supercontinent, Pangaea, further influenced the continental climate, creating arid inland regions due to the distant moderating effects of the large oceans. Glaciations affected the climate by contributing to the formation of land bridges between continents and altering the habitats and distribution of life on Earth.
What are the responsibilities of the region of the brain highlighted below?
=+= WILL RATE BRAINIEST IMMEDIATELY!!=+=
Answer: THE CEREBELLUM IS RESPONIBLE FOR
COORDINATION!!!!
Explanation:
its responsible for all body coordination,:)
Which of these is not a process that can cause speciation?
A. Chromosomal mutation
B. Genetic damage
C. A bottle neck
D. DNA replication
Answer: it's DNA Replication
Explanation: APEX
DNA replication is not a process that can cause speciation.
Speciation
The process by which new species are formed from the existing species is termed speciation.
Speciation Types
Allopatric SpeciationParapatric SpeciationPeripatric SpeciationSympatric SpeciationFactors Affecting Speciation
Genetic Drift- Genetic drift leads to the formation of new species by causing a population of organisms to be genetically distinct from the original population.Natural Selection- Natural selection is the process in nature by which organisms that adapt to their environment tend to survive and reproduce more than those less adapted to their environment.Geographic isolation- The populations of species are divided by geographic barriers. These geographic barriers may include rivers, water bodies, and mountains.Mutation- The accumulation of many small genetic changes in a population is known as mutations.Therefore, Option (D) DNA replication is the correct answer
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What are sunspots? Pleaseee answer nowwww scienceee
Explanation: Sunspots are dark areas that appear on the surface of the Sun. caused by strong magnetic activity within the Sun.
~Hope this helps
Sunspots are darker, cooler areas of the surface of the sun in a region called the photosphere. Which has temperature of 5,800 degrees. Caused by interaction with suns magnetic field which are not fully understood.
How much solar radiation is reflected back by clouds?
Answer:
Twenty-four percent
Explanation:
Twenty-four percent of solar radiation is reflected back by clouds.
Answer: The correct answer is 30 percent
Explanation:
help me please !!!!
Answer: B is an unsaturated fatty acid
Whats 2 examples of homologous structures?
Answer:
Homologous structures are those that share evolutionary and developmental origins. When discussing them one usually refers to those that have different uses in organisms. For instance the malleous and stapes bones in the middle ear of mammals are used to transfer sound whereas in most lizards these bonse are used in jaw articulation.
Other examples will be the forelimbs of a quadrupeds that includes the same bones as the human arm.
Another interesting example is the equivalent of one of the wrist bones in most mammals is used as a pseudo thumb in pandas.
What is the difference between an acidic solution and a basic solution?
The difference between an acidic solution and a basic solution lies in their pH value and hydrogen ion concentration. Acidic solutions have a pH less than 7 and high hydrogen ion concentration, while basic solutions have a pH greater than 7 with lower hydrogen ion concentration.
The main difference between an acidic solution and a basic solution lies in the pH value and the concentration of hydrogen ions (H+ or H3O+). An acidic solution has a pH less than 7 and a higher concentration of hydrogen ions, which means [H3O+] > 10-7 M. Conversely, a basic solution, also known as alkaline, has a pH greater than 7; this indicates a lower concentration of hydrogen ions, or in other words, [H3O+] < 10-7 M. A neutral solution stands exactly at a pH of 7, meaning [H3O+] = 10-7 M, with equal concentrations of hydrogen and hydroxide ions.
Acids are substances that increase the concentration of hydrogen ions when dissolved in water, while bases decrease it. This ion concentration is a critical factor in determining a substance's acidity or basicity. Solutions with pH values lower than 7 are considered acidic, while those with pH values higher than 7 are seen as basic. For example, gases like CO2, NO2, and SO2 can dissolve in water to form weak acids, which is why rainwater is naturally slightly acidic.
a key difference between green algae and land based plants is that
Answer:
Green Algae can either be unicellular ( single-celled) or multi-cellular while land bases plants are typically multi-cellular organisms ( made up of many cells)
Explanation:
A key difference between green algae and land based plants is that; while plants are typically multi-cellular organisms, Algae can either be unicellular ( single-celled) or multi-cellular.
Thus the key difference between green algae and land based plants is their complexity. Algae are simple organisms while plants are complex, with several specialized structures.
Rough endoplasmic reticulum is the area in a cell where ___ are synthesized.
Answer:
proteins
Explanation:
Rough endoplasmic reticulum is the area in a cell where proteins are synthesized.
A species of fly has two alleles for the length of their legs. The allele for long
legs is dominant, and is represented by p. The allele for short legs is
recessive, and is represented by q. If 21 of 100 organisms have short legs,
what is p?
p'+ 2pq + q* = 1
O A. 0.54
OB. 0.21
O C. 0.79
O D. 0.46
If 21 of 100 organisms have short legs (q2 = 0.21 >> q = 0.46), then the value of p is equal to 0.54.
What is the Hardy-Weinberg equilibrium?Hardy-Weinberg equilibrium is a model used in population genetics to estimate genetic and allele frequencies.
This model (Hardy-Weinberg equilibrium) is used to estimate allele frequencies in absence of different evolutionary forces.In conclusion, if 21 of 100 organisms have short legs (q2 = 0.21 >> q = 0.46), then the value of p is equal to 0.54.
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20. Which activity is an example of a chemical change?
(1) dissolving table salt in water
(3) hammering aluminum into thin sheets
(2) melting gold to make jewelry (4) burning wood to produce ashes
Burning wood to produce ashes is an example of a chemical change because it results in the formation of new substances with different properties than the original material.
The activity that is an example of a chemical change is burning wood to produce ashes. Unlike the other options, which involve changes in physical state or shape that are reversible and that do not involve the formation of new substances, burning wood results in a transformation that creates entirely different substances, such as carbon dioxide and water, from the original wood.
Chemical changes are characterized by a change in the chemical identity of the substances involved. New substances with different chemical properties from the original substances are formed. In the case of burning wood, the wood combusts with oxygen in a chemical reaction to form ash, carbon dioxide, and other compounds, which cannot be turned back into wood, illustrating a chemical change.
Salazar made a chart to describe some relationships among species. Relationships among Species X Y Boxing crabs gently carry anemones in their claws to sting predators and keep them away. The anemones feed off bits of food the crab drops. Fleas live on the warm body of a dog, biting the dog and eating its blood. The flea bites cause the dog to itch. Which headings best complete the chart? X: Competition Y: Parasitism X: Competition Y: Commensalism X:Commensalism Y: Mutualism X: Mutualism Y: Parasitism Mark this and return
The headings that best complete the chart are X: Commensalism and Y: Parasitism.
Explanation:The headings that best complete the chart are:
X: Commensalism - Boxing crabs gently carry anemones in their claws to sting predators and keep them away. The anemones feed off bits of food the crab drops.Y: Parasitism - Fleas live on the warm body of a dog, biting the dog and eating its blood. The flea bites cause the dog to itch.In the first relationship, the boxing crabs and the anemones have a commensal relationship because the anemones benefit from the shelter and food dropped by the crab, while the crab is not affected. In the second relationship, the fleas are parasites because they benefit by feeding on the dog's blood, while the dog is harmed by the bites and itching caused by the fleas.
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An important part of topsoil is
loam
permafrost
growing plant roots
decayed organic matter
Answer:
decayed organic matter
Explanation:
Decaying organic matter is an important part of topsoil found worldwide.
Incorrect answers (with explanation):
Loam is a type of soil, not a part of topsoil.
Permafrost is only found in arctic regions, and is frozen ground, not a part of the soil.
Plant roots grow into topsoil, but are not a part of the soil itself.
I hope this helps!
Order the terms from simplest to most complex paried based, DNA molecule, chromosomes, gene, cell, arm, person
Arranging the terms from simplest to most complex is Gene, DNA molecule, Cell ,Chromosomes , Arm and Person.
Gene: A gene is the basic unit of heredity and consists of a specific sequence of DNA that codes for a particular trait or function.
DNA molecule: A DNA molecule is a complex biomolecule that carries genetic information in living organisms. It consists of two strands that form a double helix.
Cell: A cell is the fundamental structural and functional unit of life. It contains DNA and other cellular structures that carry out various biological processes.
Chromosomes: Chromosomes are thread-like structures made of DNA and proteins found in the cell nucleus. They carry a large amount of genetic information and house many genes.
Arm: An arm is a part of the human body and consists of bones, muscles, blood vessels, and other tissues. It is a more complex structure compared to individual cellular components.
Person: A person is the most complex entity on the list. It is a living organism composed of trillions of cells organized into tissues, organs, and organ systems, and possesses unique characteristics and abilities.
The given question is incomplete the complete question is :
Order the terms from simplest to most complex: gene, DNA molecule, chromosome, cell, arm, person. Explain your Answer .
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Correlational studies show that prolonged viewing of televised violence______increase rates of violent behavior
a) inhibits
b) causes
c) is unrelated to
d) predicts
ANSWER:
The correct answer is Predicts.
EXPLANATION:
Prolonged viewing of violent TV programs leads to those viewing the violent programs to react in a violent manner to situations in routine life. When one watches a violent TV program in which a good character reacts violently to a situation, it is accepted by the viewers as the right way of dealing with situations. Therefore, it can be predicted that most viewers will react to the situation violently like the good character of the program.
Correlational studies suggest that prolonged viewing of televised violence predicts higher rates of violent behavior. This doesn't imply causation, meaning that other factors might also contribute.
Explanation:Correlational studies show that prolonged viewing of televised violence predicts increase rates of violent behavior. Correlational studies observe a relationship between two or more variables without influencing either one of them. In this case, the variables in question are the prolonged viewing of televised violence and the increase in rates of violent behavior. This does not mean that watching violent television directly causes violent behavior. Rather, the research suggests that there is a possible relationship or association between the two. There may be other contributing factors involved, such as individual personality traits or environmental factors.
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Introduced species often take over an ecosystem because they usually ____.
Answer:
don't have any natural predators in that ecosystem.
Explanation:
i need the answer asap !!!!
Answer:
i think A but im not 100% sure
Explanation:
Question 18 of 20:
Select the best answer for the question.
18. Which of the following is true of red blood cells?
O A. Once created in bone marrow, they circulate for our lifetime
O B. They live for only 120 days
O C. They have multiple nuclei
O D. They live for only about 20 days
Answer:
Answer is B.
Explanation:
The fact that B is right eliminates A and D. C is eliminated because RBCs do not have nuclei.
To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a
In order to figure out if an individual(for a specific gene) is heterozygous or homozygous dominant(because the phenotypes are the same) you’d test cross it with a homozygous recessive.
If all the offspring have the dominant phenotype, then ur plant(individual) is homo dominant. But if there are any offspring with recessive phenotype(specifically 50% of them) then ur plant is heterozygous.
Greg has been given a small sample of metal. His teacher has assigned him to identify what type of metal he was given. Which of the following is a physical property that will help Greg to identify the metal most accurately? A. ability to burn B. color C. ability to rust D. density
Answer:
density
Explanation:
It won't be color. Many metals have the same color although if Greg was handed copper or gold they have pretty distinctive colors.
Not many metals burn. It depends on what you mean by burn. The alkali metals will burn when in contact with water. Not many ignite if you put a match them them.
Rusting is a singular property. I very few common ones rust.
I would pick density. Few metals have the same density.
Answer:
density
Explanation:
The habitat of an animal is divided by a growing city. What might happen to the animal?
The animal may
A not be able to find enough food or mates
B. move into the city to avoid effects of
pollution
c. adapt to the new habitat by overpopulating
D. be forced into extinction by conservation
In tree rings, like those shown, each "ring" of growth represents what?
A. Two years of growth
B. One season of growth
C. One month of growth
D. One year of growth
Answer:
D. One year of growth
Explanation:
Question 1
A potato is soaked in a solution of 1 cup of salt to 1.5 cups of water for one hour. After one hour the potato feels _____________ because it was in a ______________ solution.
Answer:
flaccid, hypertonic.
Explanation:
It became flaccid due to the low water potential in solution outside of potato cells, hence causing water to leave the potato cells & move into the solution.
Hypertonic solution simply means the concentration of solute is higher & water potential is lower than in potato cells.
Final answer:
A potato soaked in a strong salt solution will feel shrivelled due to water moving out of it, as it was in a hypertonic solution.
Explanation:
A potato soaked in a solution of 1 cup of salt to 1.5 cups of water for one hour will feel shrivelled because it was in a hypertonic solution. This occurs because the concentration of solutes is higher in the solution outside the potato compared to inside, creating a condition where water moves out of the potato into the surrounding solution to balance the concentration levels. This osmotic process leads to the potato losing water, hence the shrivelled texture.
Satellites orbit Earth in the
A) Mesosphere
B) Troposphere
C) Stratosphere
D) Thermosphere
Hello There!
Satellites orbit Earth in the thermosphere.
The thermosphere is the top layer of the atmosphere. In the thermosphere, the air is extremely thin because there aren't many molecules.
Answer:
its d thermosphere
Explanation:
19. The point at which a stream empties into another body of water is the
of the stream
A. headwater
B. drainage basin
C. tributary
D. mouth
Answer:
D - Mouth
Explanation:
The point at which a stream empties into another body of water is the
mouth of the stream.
What is a mouth of a stream?A river's mouth is where it empties into a lake, a larger river, or the ocean. There is a lot of activity near river mouths. A river's flow gathers up sediment from the riverbed, eroded bank material, and floating debris.A confluence also exists at the river's mouth. Sometimes a river's mouth is where it empties into the sea, where it forms a delta, as when the Nile River empties into the Mediterranean Sea.learn more about mouth of the stream here:
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