Which type of habitat lifestyle did the first fungi probably have?
a. aquatic
b. arboreal
c. amphibious
d. airborne
Ans: a. aquatic
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Based on the figure above, what snake antivenom would you administer to a person bitten by a king brown snake, if king brown snake antivenom were not available?
A) taipan B) common brown snake C) red-bellied black snake D) death adder E) tiger snake
Phospholipids have the ability to spontaneously form membranes when placed in water. Why was this important in the origin of life on Earth?
A. Membranes are used by cells to store genetic information. B. Membranes are used by cells to catalyze reactions. C. Membranes protect a cell from gases in the atmosphere. D. Membranes are used by cells to isolate their contents from the environment. E. Membranes protect a cell from high temperatures and pressures in the environment.
This type of hormone characteristically requires a second messenger
A) lipid-soluble B) steroid C) water-soluble D) prostaglandin
Viroids are ________.
A. a new class of small single stranded DNA viruses that infect some animals B. short infectious single stranded RNAs that can infect some plants C. a class of so-called slow viruses D. proteins that may infect man and other animals causing spongiform encephalopathy