Which of the following is an example of polygenic inheritance?
A) pink flowers in snapdragons
B) the ABO blood group in humans
C) white and purple flower color in peas
D) skin pigmentation in humans
D
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What group of mammals have (a) embryos that spend more time feeding through the placenta than the mother's nipples, (b) young that feed on milk, and (c) a prolonged period of maternal care after leaving the placenta?
A) Eutheria B) Marsupiala C) Monotremata
WHich of the following glands may function in helping to control the reproductive cycle?
a. thyroid b. pineal c. thymus d. pancreas e. kidney
If a ball begins to roll down an incline, its ________ energy is converted into ________ energy.
Fill in the blank(s) with the appropriate word(s).
RNA molecules that can function like enzymes are called
A) ribosomes. B) mRNA. C) ribozymes.