Scientific evidence is most likely to be consistent if it is based on reliable and accurate data obtained through controlled experiments or observations.
Explanation:
Scientific evidence is most likely to be consistent if it is based on reliable and accurate data obtained through controlled experiments or observations. These experiments or observations should be conducted using proper scientific methods and adhere to accepted standards of research.
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Which of these are by-products of cellular respiration?
A) heat, carbon dioxide, and water
B) ATP, carbon dioxide, and water
C) ATP and carbon dioxide
D) glucose, carbon dioxide, and water
E) carbon dioxide and water
The by-products of cellular respiration are ATP, carbon dioxide, and water. Thus, the correct option is B.
What is Cellular respiration?Cellular respiration may be defined as a type of chemical process that involves the breakdown of food in the cell with the release of energy in the form of ATP. It is also known as aerobic metabolism, aerobic respiration, and oxidative metabolism.
This metabolic reaction takes place inside the cell of each living organism in order to derive energy from foodstuff and release waste products.
During the process of cellular respiration, glucose and oxygen reacts with each other and finally result in the liberation of ATP, carbon dioxide, and water. In which carbon dioxide is released as a waste product.
Therefore, ATP, carbon dioxide, and water are the by-products of cellular respiration. Thus, the correct option for this question is B.
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Answer:
heat, carbon dioxide, and water
Explanation:
ATP is not considered a by-product.
Which organisms hold the largest amount of energy in most ecosystems?
A. Secondary consumers.
B. Producers. (I think is the correct answer.)
C. Decomposers.
D. Tertiary consumers.
Answer: B. Producers
Explanation:
A food chain is basically a sequence of transfer of food and energy when one organism is consumed by other organism in an ecosystem. In an energy pyramid linked with food chain the producers are present in the lowermost base level trophic level. These organisms exhibit the highest amount of energy as compared to other trophic levels. As these organisms are capable of producing their own food by process of photosynthesis by obtaining the energy from sunlight or by chemosynthesis. This energy decreases in subsequent trophic levels when producers are consumed by consumers.
Answer:
B. Producers
Explanation:
Its correct i took the test
owls eat mice.what do we call the mice?
A.prey
B.predators
C.nutrients
Answer:
A.prey
Explanation:
The owl would be called the predator because it is going after the mice. Therefore, the mice would be called prey. Mice are also nutrients but, nobody uses that word in this situation.
Answer:
Explanation:
LOL! I'm not taking your question lightly. I think the answer you want is Prey. However, from the Owl's point of view, probably you could answer nutrients. Mice are not predators. Mice are in the middle of the Food Chain. Grass or grains are on the bottom and the Owl is on top.
Thank you for the question.
In anaphase, sister chromatids separate and become full-fledged chromosomes that move to opposite poles.In anaphase, sister chromatids separate and become full-fledged chromosomes that move to opposite poles. In telophase chromosomes become less condensed and new nuclear envelopes form. In cytokinesis the cytoplasm divides.In telophase chromosomes become less condensed and new nuclear envelopes form. In cytokinesis the cytoplasm divides. Most of the cell's life is spent in interphase, when growth occurs. Cells that are about to divide replicate their DNA.Most of the cell's life is spent in interphase, when growth occurs. Cells that are about to divide replicate their DNA. In prophase microtubules form the mitotic spindle, and the nuclear envelope breaks up.In prophase microtubules form the mitotic spindle, and the nuclear envelope breaks up. At metaphase, the mitotic spindle is fully formed and chromosomes are lined up in the center of the cell.At metaphase, the mitotic spindle is fully formed and chromosomes are lined up in the center of the cell.
Answer:
Good Job
Explanation:
Celery kept in the refrigerator for several days becomes limp why does this happen
Answer:
Because celery has losen the cell turgidity.
Explanation:
Celery (Apium graveolens) belongs to the family Apiaceae, is a marshland plant. Celery is used as a salad and its extract is used fro the preparation of herbal medicine.
Celery when kept in refrigerator for several days becomes limp as celery lose its water content and become dehydrated. The cell turgidity has been lost and celery wilt.
Which of the following statements is NOT true about the process of sweating?
a. Sweating is more likely to occur on hot days than cool days.
b. Excessive sweating can lead to dehydration.
c. Sweating is likely to occur after strenuous exercise.
d. Evaporation of sweat warms the body.
Answer:
D.evaporation of sweats warm the body.
Explanation:
It doesn't warmed the body, it races the heart beat when a person is being actively moved or doing something with great strength.
Evaporation of sweat warms the body is not true about the process of sweating.
Explanation:
The main function of sweat is to reduce the elevated body temperature which is more than the normal body temperature of human body that is 37.2 degree Celsius. The sweat glands present all over skin and when the temperature rises the sweat is released. As the sweat gets evaporated from skin surface, the skin becomes cool. The content of sweat includes water and some salts.
Excessive sweating can leads to dehydration during the summer. During exercise the temperature of the body increases due to which the sweat is released from the sweat glands.
What are the pros and cons of Quadrat Sampling?
PRO: Quadrats work well for observing changes to whole populations over time, including distribution patterns, nesting and overall health. Some study techniques do not work with quadrats, however. For example, capture-recapture techniques that allow researchers to study individual animals do not work with quadrats because even slow-moving animals can move out of the study boundaries between sample periods.
CON: Despite the relative ease of designing quadrat studies, it is possible to introduce errors into a project. Quadrats that are too large, too small or spaced inappropriately often result in errors. For example, larger species require larger plots. Randomly spaced quadrats that are too small might miss too many individuals, resulting in under-representative estimates of population size.
Answer:
Pros and Cons of Quad-rats sampling are as follow:
Explanation:
It is a series of squares or Quad-rats, generally, use as a tool for the study of ecology and especially biodiversity, In these series of squares which are equal in size placed in the habitat of interest with the species which they recognized and then record its data.
Pros of Quad-rats:
Random placement is fast.Good for substrate and large species.Cons of Quad-rats:
can cause biased results.Difficult to assess the precision of estimate from one survey.Which of the following scenarios would prevent a population from being in Hardy-Weinberg equilibrium?
A. The population will fall out of Hardy-Weinberg equilibrium if natural resources such as food are limited.
B. The population mates at specific times of the year, causing the population to fall out of equilibrium at that time of year.
C. The population is stable, but younger generations of the population have a different allele frequency.
D. The population is evolving, and natural selection is favoring one allele over another.
Answer:
D
Explanation:
One of the assumptions of the Hardy Weinberg equilibrium is that the population should not experience mutations. Mutations are usually the base on which natural selection acts by selecting the advantageous alleles and weeding out the disadvantageous ones. This is how populations evolve.
Other assumptions of this equilibrium are; there should be no migration (hence gene flow), the population is infinitely large, and mating is random.
The Hardy-Weinberg principle holds under specific conditions. Any scenario causing evolution, such as natural selection favoring a specific allele, will prevent a population from maintaining the Hardy-Weinberg equilibrium.
Explanation:The Hardy-Weinberg principle describes the conditions under which a population's genetic variation remains constant from one generation to the next. The populations that are in Hardy-Weinberg equilibrium should satisfy five assumptions: no mutation, random mating, no gene flow, infinite population size, and no selection. Out of the given options, the scenario which would prevent a population from being in Hardy-Weinberg equilibrium is 'the population is evolving, and natural selection is favoring one allele over another'.
This scenario, also known as selection, violates the principle's assumption of no selection. If natural selection occurs, and certain alleles confer survival advantages leading to their increased future prevalence, the genetic makeup of the population will change. Hence, the Hardy-Weinberg equilibrium will be disturbed.
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For an animal living a diplontic cycle, meiosis is limited to:
producing gametes
producing growth
fertilization
development of the zygote
What is the role of DNA helicase during DNA replication? A. To unwind the duplex DNA B. To attach primers to the replicating strands C. To add bases in the sugar-phosphate backbone
Answer:
A
Explanation:
DNA Helicase 1)unwinds and 2)unzips the double stranded DNA molecule by breaking the hydrogen bonds between complementary nitrogenous bases.
Primase catalyses the addition of primers to DNA to provide a 3'-OH group that DNA polymerase can add free deoxyribonucleotides (or deoxyribonucleoside triphosphate) to elongate the primers during DNA replication.
DNA polymerase catalyses the addition of free DNA nucleotides to complementary bases and catalyses the formation of phosphodiester bonds between 3'-OH group of a DNA nucleotide and 5'-phosphate group of another DNA nucleotide.
The ability of an organism to ______ (assimilate or adapt) to it's environment is due to potential variation.
Answer:
i believe its adapt
Explanation:
given enviroment are called adaptations.
A chromosomal mutation in which a segment is missing is called a deletion. True or false?
Answer:
True
Explanation:
The moon exerts a grater influences than the _____ because it’s closer
A.sun
B.earth
C.jupiter
A.
The moon is responsible for many of the tidal forces on Earth.
Answer:
A. Sun
Explanation:
The response of plants to periods of light and dark is called ______________. photoperiodism nocturnal variation daily activity seasonal variation
Answer:
Photoperiodism
Explanation:
The term "photoperiodism" was coined to describe a plant's ability to flower in response to changes in the photoperiod: the relative lengths of day and night. Because flowers produce seeds, flowering is crucially important for the plant to complete its life cycle.
leopold's genotype is xY. what does this mean?
A.leopold had hemophilia
B.leopold did not have hemophlilia
C.leopold was a carrier of hemophilia,but did not have the disease
D.leopold's daughter would have hemophilia
An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the:
A. inner ear
B. middle ear
C. eardrum
D. hammer/anvil
Answer:a inner ear
Explanation: because the ear drum
What name is given to the process in which a strand of dna is used as a template for the manufacture of a strand of pre-mrna?
That is called Transcription
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Which tube is cut to produce sterility in the male?
In 1928, Frederick Griffith conducted an experiment in which he injected mice with different kinds of bacteria. When bacteria that cause disease (pathogenic) were injected in healthy mice, these mice got sick and died. Other types of bacteria (nonpathogenic) did not cause the mice to die. Griffith took the DNA from dead pathogenic bacteria and transferred it into living nonpathogenic bacteria. These altered bacteria were then injected into healthy mice. The mice died of the same disease caused by the pathogenic bacteria. Based on this information, which statement would be a valid conclusion?
a) When an organism dies, the DNA changes; it no longer provides the same genetic information.
b) When DNA from one organism is transferred to another organism, the DNA no longer functions.
c) DNA in different types of bacteria carries exactly the same type of information.
d) When DNA from one organism is transferred to another organism, it can give new traits to the second organism.
The statement that would be a valid conclusion is as follows:
When DNA from one organism is transferred to another organism, it can give new traits to the second organism.Thus, the correct option for this question is D.
What is DNA?DNA may be defined as a type of genetic material that encodes the genetic information of an individual and governs the process of transformation of traits and genotypes from one generation to another. DNA stands for Deoxyribonucleic acid.
According to the experiments performed by Frederick Griffith, it can be revealed that when the DNA of one organism is transferred to another organism, it can give rise to new traits in the second organism.
This is because it is plausible for DNA to be changed either through mutation or the introduction of foreign DNA.
Therefore, when DNA from one organism is transferred to another organism, it can give new traits to the second organism is a statement that would be a valid conclusion.
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Final answer:
The correct conclusion from Frederick Griffith's 1928 experiment on bacterial transformation is d) When DNA from one organism is transferred to another organism, it can give new traits to the second organism, as seen when non-pathogenic R strain bacteria transformed into pathogenic S strain bacteria after acquiring DNA from the heat-killed S strain.
Explanation:
In 1928, Frederick Griffith conducted an experiment that demonstrated the process of bacterial transformation. He observed that when he injected mice with a mixture of live R strain (non-pathogenic) and heat-killed S strain (pathogenic) of Streptococcus pneumoniae, the mice died of pneumonia. The live R strain had absorbed the DNA from the dead S strain, gained a capsule, became pathogenic, and thus transformed into the S strain. Consequently, this led to the conclusion that DNA carries genetic information which, when transferred to another organism, can endow it with new traits.
Based on these observations, the correct answer to the student's question is d) When DNA from one organism is transferred to another organism, it can give new traits to the second organism. This aligns with the experiment's results indicating that DNA is the material responsible for heredity and that it can transform the phenotype and genotype of an organism when it is absorbed from the environment.
Which of the following are advantages of endospores? Endospores reproduce more quickly and are more resistant to environmental toxins than vegetative cells. Endospores are more resistant to dry conditions and are more efficient at producing ATP than vegetative cells. Endospores reproduce more quickly and are more efficient at producing ATP than vegetative cells. Endospores are more resistant to dry conditions and are more resistant to environmental toxins than vegetative cells.
Answer:
B. Endospores are more resistant to dry conditions and are more efficient at producing ATP than vegetative cells.
D. Endospores are more resistant to dry conditions and are more resistant to environmental toxins than vegetative cells.
Endospores are highly resistant to dry conditions and environmental toxins, serving as a survival mechanism for bacteria in harsh environments. They do not focus on ATP production or reproduction while in their dormant state. Hence, the last option is correct.
Endospores serve as a survival mechanism, ensuring the bacterial genome can endure periods where conditions are not conducive for the active, metabolically functioning vegetative cell. They withstand a plethora of harsh environments including desiccation, chemical exposure, extreme temperatures, and even radiation. However, they are dormant and do not perform activities such as ATP production or reproduction during this state. When favorable conditions return, an endospore can germinate to become a vegetative cell.
Deer Cave cannot support photosynthesis is as not enough sunlight is present. In spite of this, it still has a complex food chain. What is the energy foundation of this food chain?
Answer:
A cave is a prime location for bats of all species.
Explanation:
Bat dung, or guano, on the cave floor has it's own ecosystem of insects, and other animals that feed on the guano, creating a self contained ecosystem.
Answer:
The energy foundation in a deer cave ecosystem are the organic material, such as guano, other animal droppings and washed-in plants during flooding. Excess rainwater washes leaves, twigs and plants into a cave, providing munchies for insects and other animals.
Explanation:
The food chain in the cave start from the poop of bats known as guano, other animal droppings and washed-in plants that provide nutrients for fungus and microscopic bacteria. Then, millipedes and tiny crustaceans feed on the fungus, bacteria and the nutrients left behind. Bigger insects, such as cave beetles, feed on these millipedes, crustaceans and even the eggs of cave crickets. Centipedes, cave spiders, salamanders and cavefish feed on insects smaller than them. Some cave centipedes grow so large that they feed on bats.
The genetic code is essentially the same for all organisms. From this, one can logically assume which of the following?Different organisms have different numbers of different types of amino acids.DNA was the first genetic material.The same codons in different organisms translate into the different amino acids.A gene from an organism can theoretically be expressed by any other organism.All organisms have experienced convergent evolution.
Answer:
Here is the correct option: A GENE FROM AN ORGANISM CAN THEORETICALLY BE EXPRESSED BY ANY OTHER ORGANISM.
Explanation:
The theory of evolution has clearly showed us that all living things on earth have common ancestors. This fact has been established by the study of genetic materials in different organism. The similarity between two organisms can easily be measured by the amount of DNA that the organisms have in common. Because, the genetic code in all living organisms are essentially the same, genes from a particular organism can be expressed by another organism. A good example of this is seen in the use of PCR (Polymerase chain reaction) in which a DNA from a human can be replicated and multiply by a bacteria.
Sea levels are rising due to climate change while increasing numbers of people are moving into coastal areas. To accommodate more people, there has been increased construction of beachfront resorts and condominiums. How is this impacting sea turtle numbers and biodiversity and why?
A. The increased human population in coastal areas has meant that more food is available to the turtles (e.g., dropped food, waste from restaurants), which has led to an increase in the numbers and diversity of sea turtles.
B. There has been very little change in the numbers and biodiversity of sea turtles because the planet is so vast that they can simply relocate to less crowded beaches.
C. This has resulted in a decrease in numbers and diversity of sea turtles because it is restricting available nesting sites, and hence reproduction.
D. This has resulted in an increase in numbers and diversity of sea turtles because people are around to protect them from natural predators.
Answer:C
Explanation:
Answer:
C. This has resulted in a decrease in numbers and diversity of sea turtles because it is restricting available nesting sites, and hence reproduction.
Explanation:
Climate change has become an increasing threat to all species across the planet. The adverse effects of the changing climate are transferred to the ocean, where the temperature of the sea surface is increasing and rising sea level can change the marine ecosystem at many levels.
And sea turtles in one species that is affected much by this climate change. Since the sea turtles lays their eggs on the sand beach and spend rest of their lives in the ocean, climate change is affecting their life on both the sea and the ocean.
As given in the question that there is a rise in the sea level due to climatic change while there is an increase in the numbers of people moving into the coastal areas. To accommodate these people, there has been increased construction of beachfront resorts and condominiums. But this will lead to less availability of beach sand for the sea turtle for breeding and to lay eggs. Thus there is a decrease in the number of the these species.
(Please help me out here..)
Over the last several centuries, scientists have made the following broad observations while investigating several branches of the life sciences:
-The fossil record shows that different types of organisms have existed at different times in Earth's history.
-Many organisms have similar body structures that seem to be adapted to different ways of living in their environment.
-Organisms of different species often share similarities in stages of embryonic development.
-Many species share genetic similarities, and almost all organisms use the same basic building blocks to construct proteins.
-Often, the extent of two species' similarities can be predicted from their geographic closeness to each other.
-A great deal of change has been observed among species that have experienced strong selective pressures through many generations.
------
Scientists have carefully considered and rigorously tested the observations listed above.
When scientists offer a ____ of these observations, they are making a____.
1.) Testable Explanation, Deductive Explanation
2.) Scientific Interference, Scientific Law
Answer:
The correct answer will be option-
1. Testable Explanation
2. Scientific Law
Explanation:
A scientific investigation involves the scientific method to explain any natural phenomenon.
All the given statements the statements which can be tested that is they are the hypothesis which can be tested through the scientific experiments. When the experiments by researchers test and supports the hypothesis provides the facts then these scientific hypothesis gets transformed wither as a theory or law.
Thus, the selected options are the correct answer.
Please help!!!
Which of the following best describes how the process of mitosis results in the formation of new cells?
A. Cells grow during prophase, their DNA replicates during metaphase and separates into two nuclei during anaphase, and the cytoplasm divides during telophase.
B.DNA condenses into chromosomes during prophase, chromosomes line up during metaphase and separate during anaphase, and separate nuclei form during telophase.
C. Roma zones replicate during prophase, separate during metaphase and replicate again during anaphase, and nuclei form around the chromosomes during telophase.
D. Chromatids separate during prophase, replicate during metaphase and are pulled to opposite ends of the cell during anaphase, and cytokinesis it’s a cell in half during telophase.
Answer: B
Explanation:
Answer:
B.DNA condenses into chromosomes during prophase, chromosomes line up during metaphase and separate during anaphase, and separate nuclei form during telophase.
Explanation:
just took test and got it right
In the biosphere, what acquires carbon present in the atmosphere
Answer:
Plants.
Explanation:
Plants(namely, trees) absorb the carbon from the atmosphere and stores it within thenselves.
Answer:
The correct answer would be - Autotrophs or green plants.
Explanation:
Terrestrial autotrophs in the terrestrial biosphere capture the carbon present in the atmosphere in the form of the carbon dioxide directly to perform the photosynthetic process from the air. On the other hand, the marine biosphere the marine autotrophs obtain carbon from the water in the dissolved form of carbonic acid.
The autotrophs or the green plants present in both biosphere incorporated the carbon from the atmosphere into the biosphere.
Thus, the correct answer is - autotrophs or green plants.
Creating new biofuels is an example of ____. A) white biotechnology B) red biotechnology C) blue biotechnology D) green biotechnology
Answer:
A. White biotechnology
Explanation:
White biotechnology is also known as industrial biotechnology. White biotechnology converts microorganisms and enzymes into industrial goods like chemicals, plastics, and energy supply.
Biofuel is fuel made up of organic matter and are mostly used for transportation. A good example would be ethanol which is mixed with petroleum. The mixture increases the combustion performance and decreases the carbon monoxide emmisions of the vehicle.
Frutose and glucose are examples of ____.
Polysaccharide
Disaccharides
Isomera
Plastide
A geologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. Based on this information, the sample mineral has to be softer than A. orthoclase. B. corundum. C. fluorite. D. apatite.
Answer:
B. Corundum
Explanation:
Using the Mohs scale of hardness, the mineral has a hardness greater than 6.5 (Steel nail) but less than 8.5 (Drill bit). The corundum has a hardness of 9.0, which means it cannot be scratched by a drill bit, but all the other choices have a hardness scale less than 6.5 but the mineral was not scratched by the nail. So the best answer would be B.
Based on the given information,corundum is a mineral that can't be scratched by a steel nail but can be scratched by a masonry drill bit.The correct option is B.
Minerals are defined as a chemical compound which has a well -defined composition and possesses a specific crystal structure.It occurs naturally in the pure form.
If a compound occurs naturally in different crystal structure then each structure is considered as a different mineral.The chemical composition of a mineral varies depending on the presence of small impurities which are present in small quantities.
Using the Mohs scale of hardness, mineral hardness is determined.The hardness of steel nail is 6.5 and that of drill bit is 8.5 . The corundum has a hardness of 9.0, which means it cannot be scratched by a drill bit, but all the other choices have a hardness scale less than 6.5 but the mineral was not scratched by the nail.
Thus, option B is correct.
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How are endocrine and exocrine glands different from each other?
Answer:
Endocrine, or ductless glands, while Exocrine glands are all ducted glands.
Explanation:
Endocrine glands secrete substances (like hormones) into blood without the use of ducts, whereas exocrine glands use ducts to secrete substances into the external environment.
Endocrine and exocrine glands are differentiated by how they release their secretions. Endocrine glands release hormones directly into the bloodstream, whereas exocrine glands release their secretions through ducts onto epithelial surfaces.
Explanation:The endocrine and exocrine glands are types of glands in the body's system that classified based on how they release their secretions in the body. Endocrine glands are referred to as 'ductless glands' because they release hormones directly into the bloodstream where they travel to target tissues. Examples of endocrine glands include, the pituitary, thyroid, and adrenal glands.
On other hand, Exocrine glands release their secretions through ducts onto epithelial surfaces, such as the skin or the lining of the stomach or intestines. Examples of exocrine glands include sweat, salivary, mammary glands and liver that releases bile.
In summary, the main difference between endocrine and exocrine glands is/how/ they release their secretions in the body.
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