All vertebrates have _____
a. an open circulatory system c. lungs
b. a two-chambered heart d. none of these
D
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Freshwater fish reside in hypotonic environments. They do not drink water, and they excrete large volumes of hypotonic urine in an effort to osmoregulate. How do they obtain an adequate supply of electrolytes?
A) The rectal gland is specialized to produce the dilute (hypotonic) urine and conserve ions. B) Chloride cells transport additional electrolytes into the circulation of these organisms. C) Gill filaments take up additional electrolytes from freshwater. D) There is an increase in Na+/K+-ATPase activity across the basolateral membrane.
Anoxygenic photosynthesis occurs in which of the following organisms?
Cells can use (active/allosteric/substrate) sites to regulate enzyme activity and thereby control their metabolism
What will be an ideal response?
Some diseases can be vertically transmitted. This is understood to mean the disease is transmitted
A) By contact between siblings B) From parent to offspring via respiratory route C) Between higher and lower animals D) Between people living or working in the same building E) From parent to offspring via milk, ovum, sperm, or placenta.