You are observing a single cell under a microscope. You go home for the night, and the next day you see four cells. The four cells look similar, and when you stain them with a dye that binds to DNA they all appear to contain the same amount of DNA as the
original cell. What likely happened overnight?
A) The single cell divided once to form four new cells via asexual reproduction.
B) The single cell divided once to form four new cells via sexual reproduction.
C) The single cell divided to form two new cells, and the two new cells each divided to form four total cells, all by asexual reproduction.
D) The single cell divided to form two new cells, and the two new cells each divided to form four total cells, all by sexual reproduction.
Answer: C
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If a mutation occurred in a flatworm such that the flame cells no longer functioned, what do you predict would be the consequence?
A. The parasitic forms could no longer hold onto their host. B. Excretory function would be impaired. C. Digestive function would be impaired. D. Nerve function would be impaired. E. Reproductive function would be impaired.
Most vegetable oils are:
a. liquid at room temperature and saturated b. unsaturated and solid at room temperature c. found only in animals d. complex carbohydrates e. liquid at room temperature and unsaturated
A mechanism of gene regulation that controls the amount of mRNA available for translation is called
____________________. Fill in the blank(s) with the appropriate word(s).
When muscles are exercised extensively in the absence of sufficient oxygen
a. a large amount of ATP is formed b. NADH molecules split c. lactic acid is produced d. oxidative respiration ceases