During the first meiotic division
A) spermatogonia and oogonia form.
B) homologous chromosome pairs separate.
C) homologous chromosome pairs join.
D) the cell becomes diploid.
B) homologous chromosome pairs separate.
You might also like to view...
Rickettsias enter host cells by inducing ________.
Fill in the blank(s) with the appropriate word(s).
During daylight hours, primarily ____
a. Pr absorbs red light and is converted to Pfr b. Pr absorbs far-red light and is converted to Pfr c. Pfr absorbs red light and is converted to Pr d. Pfr absorbs far-red light and is converted to Pr e. Pfr is converted to Pr
Human spermatogonia
A. are diploid. B. are diploid cells that reside within the seminiferous tubules. C. are germ cells. D. are germ cells that reside within the seminiferous tubules. E. reside within the seminiferous tubules.
Which result is an observed effect of global warming on organisms?
A) Some species of birds and frogs now begin their breeding seasons earlier in the year. B) Corals "bleach" when decreased water temperatures cause them to expel their symbiotic algae. C) Many butterfly populations have shifted their ranges toward the equator. D) Many polar bears produce more offspring as their hunting grounds increase in size.