Biology MCQs

Page No. 20

Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.


aExcessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment


bTrimethyl alanine


cAmmonia


dTrimethylamine oxide


View Answer Trimethylamine oxide

In a hot summer after noon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of____________?


aPositive feed back


bNegative feed back


cFeed back


dOsmoregulation


View Answer Negative feed back

Rose is an example of____________?


aHydrophytes


bMesophytes


cXerophytes


dHalophytes


View Answer Mesophytes

Which of the following fishes excrete large volume of diluted urine?


aBony Marine fishes


bFresh water fishes


cBoth depending upon the surrounding water


dNone of these


View Answer Fresh water fishes

The characteristic which enable animals to tolerate dehydration is called__________?


aOsmoconformation


bOsmoregulaton


cAnhydrobiosis


dAnhydrosis


View Answer Anhydrobiosis

Which of the following structure in plant’s body is called excretophores?


aStem


bLeaves


cFlowers


dRoots


View Answer Leaves

Thermostat of human body is present in__________?


aFore brain


bHind Brain


cThalamus


dHypothalamus


View Answer Hypothalamus

Production of pyrogens is a __________ phenomenon?


aProtective


bDestructive


cConstructive


dAggressive


View Answer Protective

Blubber a thick layer of fat is present in___________?


aFresh water mammals


bTerrestrial mammals


cMarine Mammals


dFlying mammals


View Answer Marine Mammals

Animals that produce metabolic heat at low level and also absorb heat from the surroundings are called__________?


aEndotherms


bEctotherms


cHeterotherms


dHomeotherms


View Answer Heterotherms

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