Which of the following statements does NOT describe characteristics of heterospory?
A. Heterospory involves production of spores on two different parts of the same plant.
B. Heterospory involves production of two different kinds of spores, one growing into male gametophytes and the other into female gametophytes.
C. Heterospory increases the chance of cross-fertilization.
D. Heterospory increases the potential for genetic variation and aids evolutionary flexibility.
E. Heterospory only occurs in vascular plants.
A. Heterospory involves production of spores on two different parts of the same plant.
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Imagine five forest communities, each with one hundred individuals distributed among four different tree species (W, X, Y, and Z). Which forest community would be most diverse?
A) 25W, 25X, 25Y, 25Z B) 40W, 30X, 20Y, 10Z C) 50W, 25X, 15Y, 10Z D) 70W, 10X, 10Y, 10Z E) 100W, 0X, 0Y, 0Z
Amoebas move from place to place by means of their
A. cysts. B. pseudopods. C. pseudomonads. D. sporocarps. E. plasmodia.
The primary function of molecular membranes is the transport of ions and molecules in and out of cells— transport is directional and selective. The moving of molecules from areas of high concentration to those of low concentration to gain energy is best described as:
a. channel-mediated diffusion. b. active transport. c. inactivated transport. d. electron transport. e. passive transport.
Which of the following is a benefit gained from learning how to sequence DNA?
A. modification of crops to increase yields B. identification of faulty genes C. understanding of our evolutionary history D. development of treatments for diseases E. all of these are benefits gained from DNA sequencing