When a neuron membrane potential becomes less negative, it is said to be ____
a. depolarized
b. hyperpolarized
c. repolarized
d. damaged
e. activated above the threshold potential
ANSWER: a
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Why do some biologists use the name Craniata instead of the name Vertebrata?
A. Hagfish have a bony cranium but no vertebrae. B. Hagfish are too different from Cephalochordates to be included in that group. C. Hagfish are not represented by very many species, so cannot be given their own taxonomic grouping. D. Hagfish are understudied, so can only be grouped with other taxa based on their lack of characters.
Osteoclasts function in bone remodeling to
a. free mineral ions. b. stimulate blood cell formation. c. accelerate bone repair. d. lay down a bony matrix. e. do all of these.
In eukaryotic cells, transcription occurs in the nucleus and translation occurs in the cytoplasm
a. true b. false
On the basis of nutrient content, a mountain lake with little sediment or nutrients is classified as a(n) ________ lake
Fill in the blank(s) with correct word