In an effort to determine the mechanism of neuronal signaling, Otto Loewi isolated ____
a. frog hearts
b. frog brains
c. rat hearts
d. rat brains
e. rat vagus nerve
ANSWER: b
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A tiny loop of double-stranded DNA describes a
(a) bacterium. (b) DNA ligase. (c) plasmid. (d) antibiotic.
When a ciliate reproduces asexually by mitosis:
A. The macronucleus divides into two with each new cell receiving an identical macronucleus. B. The macronucleus divides into four micronuclei with each new cell receiving two micronuclei each. C. The macronucleus doesn't divide but it goes to one new cell and the micronuclei go to the other. D. The macronuclei fuse with the micronuclei and then divide into two with each new cell receiving an identical fused nucleus. E. none of the other choices provided
________ pump protons to keep the internal proton concentration of lysosomes high
Fill in the blank with correct word.
What did researchers find is a profit motive that can be applied to solve the fisheries crisis?
What will be an ideal response?