A developing fetuses sex is determined by
a. female gamete (oogonia).
b. at the beginning of the third trimester.
c. male gamete (spermatogonia).
d. puberty.
e. autosomes.
C
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Surface currents in the ocean typically
A) flow most strongly from west to east in equatorial regions. B) are colder on the western side of continents. C) flow counterclockwise in gyres in the Northern Hemisphere. D) flow unimpeded from east to west just north of Antarctica.
Which of the following statements concerning an F factor is FALSE?
a. It is found in recipient cells, not donor cells. b. It is a DNA sequence. c. It is found in F+ cells. d. The F stands for fertility. e. It is involved with forming sex pili.
An example of a habitat preference is shown if an animal will only breed
A. in the spring. B. after a spring migration. C. at night. D. in a swamp.
A bacterial cell, a plant cell, and an animal cell have which of the following structures in common?
a) cell wall b) nucleus c) cytoplasm d) nucleoid e) vacuole