Water absorption depends primarily on
a. abscisic acid.
b. cohesion-tension.
c. the concentration gradient between soil and root.
d. active transport.
e. the potassium pump.
Answer: c
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Which statement characterizes human population growth?
a. The rate of human population growth appears to be declining. b. The rate of human population growth appears to be increasing. c. The rate of human population growth is exponential. d. Human birth rates are higher than death rates. e. Human death rates are higher than birth rates.
Cells communicate with each other by various mechanisms. All of the following are examples of ways
cells communicate EXCEPT ____.
a. gap junctions b. transfer chain proteins c. recognition of specific membrane surface molecules d. cell adhesion molecules e. chemical messengers
What is the only group of mammals that is classified as eusocial?
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When the DNA of a bacterial phage is integrated into a host bacterial cell, it is considered to be _________.
a) latent b) a prophage c) attenuated d) competent