Which organelles settle on the bottom of gravity-sensing cells?
a. vacuoles
b. hormone
c. lysosomes
d. statoliths
e. starch-heavy granules
d
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Specifically, female sex organs are known as
(a) oogonia. (b) gametangia. (c) antheridia. (d) zygotes.
Archaea and bacteria are involved in which of the following cycles? (Select all correct choices.)
A. the nitrogen cycle B. the carbon cycle C. the sulfur cycle
How do protists provide evidence for the step-wise evolution of mitosis?
A. In some protists the nuclear membrane fails to breakdown during mitosis. B. Protists use conjugation instead of mitosis. C. Only meiosis occurs in protists. D. Mitosis has not been observed in any protist species.
The sequence of development of sperm is:
A) primary spermatocyte, secondary spermatocyte, tertiary spermatocyte, spermatid, sperm. B) spermatogonia, spermatocyte, spermatid, sperm. C) immature sperm, mature sperm, secondary sperm, spermatocyte. D) primary spermatocyte, spermatogonia, sperm.