In a phototropism, auxin moves to the ____ side of the stem and causes cell ____
a. shade; elongation
b. sun; elongation
c. sun; division
d. shade; division
e. shade; shrinkage
ANSWER: a
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Microbes within glaciers are ________.
A. barophilic B. dormant C. non-existent D. active
By the end of oogenesis, how many eggs are ready for fertilization?
a. 4 b. 3 c. 1 d. 2
Mucous membranes are quite thin and fragile. How can such delicate tissue provide defense against microbial invaders?
A) the mucus secreted by the mucous membrane physically traps microbes. B) the mucus contains a variety of antimicrobial chemicals and molecules. C) both the mucus and the outer layer of cells are shed frequently. D) the mucus is a physical trap that contains a variety of antimicrobial chemicals. E) the mucus physically traps microbes, contains a variety of antimicrobial chemicals, and is shed constantly, along with the outermost layer of cells.
Modern whales have bones that are remnants of a pelvis and legs that serve no function. This would be an example of a/an:
A) homologous structure. B) analogous structure. C) vestigial character. D) polygenic character.