Which of the following would be considered an advantageous mutation?
A. a mutation that makes an individual more
visible to predators
B. a mutation that increases an organism's
ability to find food
C. a mutation that decreases the offspring's
chance of survival
D. a mutation that changes hair color in
humans
E. a mutation that causes increased
susceptibility to a disease
B
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If a mutant protein is much smaller than the normal protein, the mutation responsible must be a deletion of many nucleotides.
Indicate whether the statement is true or false.
If a cell has 20 chromosomes in it, how many are there after replication occurs?
a. 30 b. 40 c. 50 d. 60
Which of the following hormones stimulates ovulation?
a. gonadotropin-releasing hormone b. luteinizing hormone c. follicle-stimulating hormone d. estrogen e. progesterone
Also called motor neurons, the ___________ send signals from the brain to the glands and muscles:
a. efferent neurons b. afferent neurons c. interneurons d. neurotransmitters