A subset of a population of birds leaves its habitat and colonizes a nearby island. After many generations, the island sinks and the population of birds living on the island returns to its original habitat. Which of the following statements most accurately describes the two bird populations?
a. The populations will be able to interbreed even though they are different species.
b. The populations were sympatric while they diverged.
c. The populations will not be able to interbreed because they are different species.
d. The birds were separated by dispersal.
Ans: d. The birds were separated by dispersal.
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Which of the following statements about diffusion is false?
A. It transports materials actively along a concentration gradient. B. It is effective only over small distances. C. It limits the size of prokaryotic cells. D. It limits the shape of prokaryotic cells. E. It supplies key molecules for metabolism.
If purple flower color is dominant in pea plants, a cross between P generation purple and white plants
will result in
a. all purple flowers in the F1 generation. b. all white flowers in the F1 generation. c. all purple flowers in the F1 generation but a lighter purple than in the parents. d. mostly purple flowers in the P1 generation, with an occasional white flower. e. half of the plants having purple flowers, the other half having white flowers.
Accumulation of a metabolic pathway product may result in decreased activity of the pathway enzymes
Indicate whether the statement is true or false
Implantation of the embryo occurs in the
a. ovary. b. uterus. c. vagina. d. oviduct. e. follicle.