Answer:
Energy coupling occurs when the energy produced by one reaction or system is used to drive another reaction or system
Explanation:
Answer:
A. These homologous structures indicate that these four organisms all share a common ancestor.
Explanation:
Homologous structures mean the organs will have similar structure, but not necessarily function (human arm vs whale's flipper). While analogous structures are similar in function but not structure (wings of an airplane vs wings of a bird). Since the question states that they are similar in skeletal structure, we know they must be homologous structures, thereby eliminating B and C. D is not a choice because the question does not provide anything about the order of evolution. Therefore the answer is A. These homologous structures indicate that these four organisms all share a common ancestor.
Genes are found on DNA, which make(s) up the chromosomes, found in nucleus.
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I think it is repeatable, testable, observable
