Which of the following cells is NOT haploid?
a. secondary spermatocyte
b. sperm
c. primary oocyte
d. spermatids
e. polar bodies
Answer: c
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___ are a type of internal signal molecule used in controlling the cell cycle.
Fill in the blank(s) with the appropriate word(s).
With respect to plant reproduction, there has been an evolutionary trend toward
A) greater seed production. B) larger fruits. C) sporophyte prominence. D) smaller flowers. E) increased pollen production.
Why does Antigenic Shift make vaccine design particularly difficult for pathogens that have a wide host range?
What will be an ideal response?
Which of the following statements about hydrocarbons is false?
A) Hydrocarbons are inorganic compounds. B) Hydrocarbons contain only carbon and hydrogen atoms. C) Hydrocarbons consist of atoms linked by single or double bonds. D) Hydrocarbons can form straight, branched, or ringed structures.