When does the synaptonemal complex disappear?
A) late prophase of meiosis I
B) during fertilization or fusion of gametes
C) early anaphase of meiosis I
D) mid-prophase of meiosis II
E) late metaphase of meiosis II
Answer: A
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As a new curator for a large public aquarium in your city, you are in charge of correctly identifying some of the animals presently in your care. You have two adult animals in tanks in front of you, and you know that one is a lamprey, and the other is a hagfish. Which feature would allow you to correctly identify each animal?
A. Lampreys lack jaws, but hagfish are jawed fish. B. Lampreys are parasitic, while hagfish are not parasitic. C. Hagfish must live in fresh water, while lampreys are entirely marine. D. Hagfish are noted for their extensive fins, while lampreys lack fins.
Cohesion rings hold the replicated DNA/sister chromatids near each other and at the transition between metaphase and anaphase:
a. securin becomes active and breaks the cohesion ring b. securin becomes active and degrades separase c. securin becomes degraded and activates separase. d. anaphase promoting complex is active and degrades securin. e. two of the above.
How does bipedalism relate to sweat glands, skin color and hair density? What will be an ideal response?
According to Darwin, fitness is a measure of
A. survival. B. differential reproduction. C. survival and differential reproduction. D. migration ability. E. genetic mutation rates.