1. The cells specialize.
A crab has an exoskeleton.
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The skin is the body's largest organ. 30% of the cardiac output goes to direct the flow of blood to the skin for cooling; the evaporation of perspiration will act to reduce body temperature. So, the skin receives approximately 30% of all the blood circulating through the body.When the body is at rest, this percent is 20%.
Nucleotide substitutions in a gene occur at a relatively constant rate.
A nonsynonymous substitution is a nucleotide mutation that alters the amino acid sequence of a protein. Nonsynonymous substitutions differ from synonymous substitutions, which do not alter amino acid sequences and are (sometimes) silent mutations.
The horned lizard can confuse a predator by shooting blood from it's eyes, with control over the height (up to 5ft) and the direction of the blood.
Answer:
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Explanation:
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