Which of the following would you take into account if you wanted to define viruses?
a. Viruses are between the biotic and abiotic worlds.
b. Viruses are able to live outside of a host organism.
c. Viruses are able to synthesize their own proteins.
d. Viruses are able to remain unchanged.
Ans: a. Viruses are between the biotic and abiotic worlds.
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Which of the following proteins assists during binary fission?
a. actin b. myosin c. Z disks d. FtsZ
What maintains the resting membrane potential?
a. Na+-K+ pumps b. leaky sodium channels c. gated sodium channels d. leaky potassium channels e. gated potassium channels
Which of the following applies to the deepest zone of a large lake?
a. effective recycling of minerals b. anaerobic conditions c. a mineral-poor zone d. plentiful light penetration e. numerous organisms
Food is moved through the digestive system by ____.
A. sphincters B. accessory organs C. smooth muscle contractions D. movement of villi E. skeletal muscle contractions