Which of the following statements about freshwater bony fish is false?
A. They drink water to replenish water
supplies.
B. Chloride cells in the gills actively pump
chloride ions into the body.
C. They are osmoregulators.
D. They tend to gain water through osmosis.
E. They maintain body fluid solute
concentrations that are higher than that of the
surrounding water.
A
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The receptors on T cells and B cells bind to _____
A) antibodies B) antigens C) natural killer cells D) double-stranded RNA E) immunoglobulins
If all members of a population have the identical DNA sequence at a given site, that site is said to be _______
A. Monomorphic B. Polymorphic C. Trimorphic
Prezygotic reproductive isolation occurs ____
a. just after the union of the egg and sperm nuclei b. during embryo development c. during fetal development d. after birth e. before the mating pair comes into contact
Aquatic arthropods that fragment organic particles and also eat bacteria and fungi on the surface of the litter are called
A) shredders. B) filtering collectors. C) gathering collectors. D) grazers.