What conditions are necessary for a population to be at equilibrium?
What will be an ideal response?
There can be no mutations, no gene flow, only random matings, no natural selection, and a large population.
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How many times could a human female ovulate in her lifetime?
a. about 40 b. about 400 c. about 4000 d. about 40 000
Which of the following does NOT possess a double membrane?
A) Nuclear envelope B) Plastid C) Ribosome D) Mitochondrion E) Chloroplast
There are vaccines for diseases caused by
a. bacteria. b. viruses. c. protozoa. d. fungi. e. a and b. f. a, b, and c.
In mammals, embryonic cells form an inner cell mass that will become the body of the embryo and a layer of surrounding cells that will become the chorionic membrane and placenta. What are these surrounding cells called?
A. Yolk B. Trophoblast C. Blastodisc D. Blastocoel