Meiosis II in the oocyte is completed ____
a. just prior to ovulation
b. just after ovulation
c. after fertilization
d. at cycle day 1
e. at cycle day 28
ANSWER: c
You might also like to view...
The oxic atmosphere created conditions that led to the evolution of various new metabolic pathways, such as
A) sulfide oxidation. B) nitrification. C) iron oxidation. D) sulfide oxidation, nitrification, and iron oxidation.
In humans and other mammals, X inactivation takes place:
A. early in development, with each new cell inheriting the same inactivated X chromosome as its parent cell. B. late in development, with each new cell inheriting the same inactivated X chromosome as its parent cell. C. throughout the lifetime of an organismâ€"with each new cell division, both X chromosomes are activated, and one is then inactivated in each new cell. D. early in development, with all maternal X chromosomes being inactivated and cells maintaining active copies of only the paternal X chromosome. E. early in development, with all paternal X chromosomes being inactivated and cells maintaining active copies of only the maternal X chromosome.
What happens when a phage containing bacterial DNA attaches to and injects DNA into another bacterial cell?
a. the phage is destroyed b. the phage replicates c. the bacterial cell dies from the phage infection d. the bacterial cell lives and produces many copies of the phage e. the bacterial cell becomes a partial diploid and may undergo genetic recombination
In the pressure-flow model of phloem transport, the sink is normally
A. the stem. B. lenticels. C. xylem. D. the roots.