A farmer decides to plant his crops in a desert. What adaptation would give them the greatest advantage in this climate?
A. C3 photosynthesis
B. symbiosis
C. mycorrhizal association
D. C4 photosynthesis
E. mycoheterotrophy
Answer: D
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Where is the trachea in reference to the esophagus in humans?
a. dorsal, or behind b. superior, toward the head c. ventral, or in front d. inferior, toward the feet
The endodermis of a root
a. regulates the transport of water and minerals into the vascular system. b. produces root hairs for the absorption of water and minerals. c. produces lateral roots in woody dicotyledons. d. transports starch to parenchyma cells for storage. e. produces starch in the roots of dicotyledons.
Lignin is to cellulose strands as ____ is to
epidermal cells. a. cuticulin b. epidermerin c. pectin d. cutin e. chitin
Many rats were tested for their ability to learn to navigate a maze. The average number of errors, for a total of 14 trials, was 64 per rat. The rats that made the fewest errors were bred to each other, and the offspring were tested in a similar way
This process was repeated for seven generations, at which point the average number of errors for 14 trials was 36. This experiment demonstrates that A) learned behavior cannot be inherited. B) maze-learning ability has a genetic basis. C) maze-learning ability depends mainly on early contact with adept parents. D) natural selection has a role in the evolution of fixed action patterns but not in the evolution of behavior involving learning.