Which is a benefit of sexual reproduction over asexual reproduction?
a. More offspring can be produced.
b. The offspring are all identical to the parents.
c. There is less variation from generation to generation.
d. Evolution will occur at a slower rate when there are two parents.
e. The interaction of the genes from both parents brings about genetic variatio
e
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All types of internal fertilization require
A. specialized anatomical structures. B. physical joining of male and female. C. transfer of a spermatophore to the female reproductive tract. D. a terrestrial environment.
An autosomal recessive disorder
a. requires that only one parent be a carrier. b. displays its symptoms only in heterozygotes. c. is more frequent in males than females. d. will appear only in children of parents who both carry the gene. e. is dominant in females.
Conservation biologists are often concerned that when the population size of an endangered species becomes too small it is at risk of extinction for which reason?
A. They can no longer evolve. B. Their rate of breeding will decline. C. They may be more susceptible to changes in the environment or disease. D. They are at risk of sympatric isolation. E. They are at risk of developing prezygotic barriers to reproduction.
Charles darwin is famous for his
a. theory of origin of life b. theory of evolution c. atomic theory