The rough ER differs from the smooth ER in that it is covered with:
a. mitochondria
b. microtubules
c. chromatin
d. ribosomes
Answer: d. ribosomes
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Four of the five answers are major advantages of group living for predators. Select the exception
a. increased hunting success b. improved success at fending off scavengers c. group defense of young d. greater strength to defend territory e. caring for each other's young
The secondary immune response ____
a. is slower and weaker than the primary response b. is dependent upon effector cells c. is dependent upon memory cells d. responds only one time to an antigen challenge e. is a major component of the innate immune response
You find a new animal. It is a large, predatory marine vertebrate covered with scales. It has a two-chambered heart and gills, and its skeleton is made of cartilage. You should classify it as
A) Amphibia. B) Actinistia. C) Actinopterygii. D) Reptilia. E) Chondrichthyes.
Under which condition would plant cells treated with auxin be able to enlarge?
A) lack of light for growing B) blocked proton pumps C) long, dry growing season D) presence of ethylene