Answer:
Ectotherms warm their bodies by absorbing heat from the surrounding environment, whereas Endotherms produce heat by their metabolic activities. • Ectotherms have large variations in normal body temperatures while endotherms maintain their body temperature in a fairly constant value
Explanation:
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It is from adult bone marrow.
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Species A and B would be the most similar because there is only one mutation between the two of them located in the first codon.
