Steroid hormones are derived from:
A. cholesterol.
B. amino acids.
C. proteins.
D. nucleotide bases.
E. phospholipids.
A
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A tRNA with a long chain of amino acids is released from the ribosome because the stop codon does not correspond with a particular anticodon that causes the tRNA to fall off, leaving only the polypeptide chain. This process is called ________
A) initiation B) elongation C) termination D) deletion
From what are fruits derived?
A. filaments B. styles C. anthers D. stigmas E. ovaries
In a certain species of salmon, some adult males are extremely large whereas other adult males are very small, compared to the females. There are no intermediate-sized adult males in the population. This is probably the result of
A) directional selection. B) artificial selection. C) disruptive selection. D) stabilizing selection.