Answer:
Evolution in nature by natural selection only modifies the structures present in the ancestors and favors the better adapted structures.
Explanation:
An engineer can design the bones and muscles of the forelimbs of given organisms as per their needs and give rise to new unique structures for each of these organisms.
On the other hand, evolution in nature allows the modification of existing traits by the accumulation of variations. The adaptive variations in the traits are then favored by natural selection. Therefore, forelimbs of mammals such as horses, whales, and bats have evolved by modification of the forelimbs present in their common ancestors.
The limitation of modification of existing structures does not allow the formation of a completely new structure.
Both aerobic and anaerobic respirations are types of cellular respiration. Both use glycolysis to produce ATP. Both generate energy by breaking down glucose. Both produce byproducts and depend on chemical reactions that are localized in the cytosol. Both use pyruvate as a substrate and both processes depend on enzymes to catalyze their respective chemical
reactions.
A fact about these two types of respiration is that aerobic respiration produces or release 19 times more energy than anaerobic respiration from the same amount of glucose
Answer:
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Answer:
They have approximately similar molecular weight, chemical composition and solubility.
Explanation:
Macro molecules are bigger molecules having more weight. The molecular weight of the macro molecules is more than 10,000 Dalton. They are chiefly the carbohydrates, proteins, lipids, and nucleotide. These are found in the acid-insoluble pool. This means all macro-molecules are acid insoluble. They are all polymers. Their composition is similar, having carbon and hydrogen which forms bonds with other compounds like nitrogen, sulphur, phosphate, OH, etc. They are all basic components of the cell and cell membrane and all are organic molecules.
A food web demonstrates which organisms transfer energy to other organisms. It helps maintain the ecosystem because if one life form went extinct, it could destroy the whole web.