Ciliates, such as Paramecium, are likely to be found in ____ or in the gut of mammalian grazers where they aid in the
digestion of _____.
a. seawater; animal flesh
b. seawater and freshwater; plant material
c. freshwater; animal flesh
d. acidic hot springs; soil minerals
e. seawater and acidic hot springs; plant material
ANSWER: b
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Which group of organisms is not classified as ectotherms? a. All of these choices are ectotherms
b. Fish c. Amphibians d. Lizards e. Mammals
An individual would develop cystic fibrosis if
he carries ____ mutated CFTR gene(s).
a. 1 b. 2 c. 3 d. 4 e. 5
The stretch reflex
a. is an adaptation that enables humans to hold objects steadily for extended periods if time. b. is activated by stretch-sensitive receptors inside the muscle spindles. c. is a simple, stereotyped, and repeatable motor action. d. is elicited by a sensory stimulus. e. all of these
In echinoderms, gastrulation takes place through a(n) primitive groove. Indicate whether the statement is true or false