Which of the following are central ideas explaining the benefits of sexual reproduction?
a. Sexual reproduction raises the fitness of populations by allowing diseases to spread faster therefore becoming less virulent.
b. Sexual reproduction purges deleterious mutations.
c. Sexual reproduction leads to recombination.
d. Sexual reproduction strengthens coadapted gene complexes.
e. B and C.
E
You might also like to view...
When a DNA promoter sequence is methylated, ____
a. it is permanently silenced because the methyl group can never be removed b. it is temporarily silenced because the methyl group can be removed c. it is perpetually transcribed because the methyl group can never be removed d. it is temporarily transcribed because the methyl group can be removed e. the impact on expression depends on the gene being controlled by the promoter
Which region(s) of the adult brain is/are derived from the diencephalon?
a. cerebrum only b. thalamus only c. hypothalamus only d. cerebrum and thalamus e. thalamus and hypothalamus
Within chromosomes, DNA is wrapped around proteins called
a. karyotypes. b. chromatids. c. nucleosomes. d. centromeres. e. histones.
Which factor, beginning in 1995, is responsible for the decline in chicken pox from a routine childhood disease to a rare infection?
A) ecological changes affecting the natural reservoir of the virus B) routine vaccination C) natural evolution of the virus to a less virulent form D) development of effective anti-viral medications E) changes in global migration patterns