Dogs and pigs are members of different species because
A. one is a predator, and the other is prey.
B. hybrids between them are infertile.
C. they are at the far end of the ring in a ring species.
D. of prezygotic barriers to their ability to breed.
E. of postzygotic barriers to their ability to breed.
Answer: D. of prezygotic barriers to their ability to breed.
You might also like to view...
Which of the following was produced in experiments on primitive Earth conditions conducted by Miller-Urey and others?
A. ammonia and water B. amino acids C. CO2 and H2O D. ammonia and hydrogen sulfide E. methane and oxygen
A nauplius larva is characteristic of:
A. echinoderms. B. gastropods. C. molluscs. D. crustaceans. E. ctenophores.
If a plant appears blue to us, what wavelength of light is being reflected?
A) blue B) green C) red D) yellow
Which term refers to an individual with three or more copies of each of their chromosomes?
a. aneuploid b. haploid c. polyploid d. euploid