Gene sharing is:
a. one way that a new molecular function can arise.
b. another form of gene duplication.
c. is a form of molecular exaptation.
d. A and B.
e. A and C.
E
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In bacteria, fungi, and plants the high internal pressure generated by osmosis is counteracted by the mechanical strength of their
A. plasma membranes. B. organelles. C. cytoskeletons. D. cell walls.
Multicellular organisms likely arose around ____ million years ago
a. 900
b. 600 c. 300 d. 100 e. 10
Which of the following is typical of cancer cells?
a. Products of oncogenes inhibit mitosis. b. Benign tumors invade normal tissue. c. Malignant cells migrate. d. Cancer cells lose the ability to divide. e. The parent cell of the tumor contains a single mutation in a single checkpoint gene.
All the following factors affect the attenuation of light in water, except
A) phytoplankton. B) water itself. C) intensity of light. D) dissolved substances.