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Test Bank for Marine Biology: Function, Biodiversity, Ecology 2E - page 11 / 44





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c. Metabolic rate always increases

d. Metabolic rate compensates by decreasing

At the southern extent of a poikilotherm species' range

a. The species probably will reproduce in summer

b. The species' survival will be at its limit in winter

c. The species will never survive

d. The species probably will reproduce in winter

Marine homeotherms have a problem in sea water because

a. They are always in variable temperature conditions

b. They are likely to be losing heat to the water

c. They have low concentrations of hemoglobin

d. Sea water tends to cool down much faster than air

When sea water freezes

a. Some fish may produce glycoproteins to lower the freezing point of sea water

b. The unfrozen water will have a higher salt content

c. Enzymes may not function

d. All of the above

Osmosis involves

a. The movement of dissolved salts across a membrane

b. The movement of dissolved salts and pure water across  a membrane in one direction

c. The movement of pure water across a membrane in the direction of higher salt concentration

d. Behavior that allows an individual to move to a habitat with favorable salinity

When salinity increases, many invertebrates react by

a. Rapidly taking up inorganic salts

b. Degrading amino acids, to produce cellular ammonia

c. Synthesizing urea

d. Synthesizing free amino acids

Damage caused by temperature could be recognized by increases in

a. Osmolytes

b. Ubiquitin

c. Sodium ion

d. Dimethyl tin

Osmolytes are chemically

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