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Biology MCQs with Explanations

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451BiologyMedium

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:

AOlder sediment layers did not have these radioactive isotopes

BOlder sediment layers have less amount of these radioactive isotopes as that of the young ones.

COlder sediment layers have equal amount of these radioactive isotopes as that of the young ones

DOlder sediment layers have greater amount of these radioactive isotopes as that of the young ones.

Correct answer

B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones.

Explanation

Older sediment layers have less amount of these radioactive isotopes as that of the young ones. is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

452BiologyMedium

Carotid artery location in human body?

ABrain

BWrist

CNeck

DElbow

Correct answer

C. Neck

Explanation

Neck is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

453BiologyMedium

Removal or degradation of environmental pollutants or toxic materials by living organisms is called__________?

AIntegrated disease management

BHydroponic culture technique

CBioremediation

DPasteurization

Correct answer

C. Bioremediation

Explanation

Bioremediation is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

454BiologyMedium

Nodules on roots of leguminous plants have __________ bacteria?

AAnaerobic

BNitrogen fixing

CAmmonifying

DNitrifying

Correct answer

B. Nitrogen fixing

Explanation

Nitrogen fixing is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

455BiologyMedium

Of the following, which one causes higher production of food in green plants?

ABlue

BViolet

CRed

DOrange

Correct answer

C. Red

Explanation

Red is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

456BiologyMedium

The characteristic which enable animals to tolerate dehydration is called__________?

AAnhydrobiosis

BOsmoregulaton

COsmoconformation

DAnhydrosis

Correct answer

A. Anhydrobiosis

Explanation

Anhydrobiosis is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

457BiologyMedium

A joint formed between humerus, radius and ulna is an example of__________?

ASlightly movable joint.

BFibrous joint

CImmovable joint.

DFreely movable joint.

Correct answer

D. Freely movable joint.

Explanation

Freely movable joint. is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

458BiologyMedium

In which group of tracheophytes ovules are born on the exposed surface of megasporophylls______________?

AGymnosperms

BSpheospsida

CAngiosperms

DFilicineae

Correct answer

A. Gymnosperms

Explanation

Gymnosperms is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

459BiologyMedium

Whone is not the function of endoplasmic reticulum?

ATransport of material

BNerve impulse conduction

CMechanical support

DSynthesis of conjugated molecules

Correct answer

D. Synthesis of conjugated molecules

Explanation

Synthesis of conjugated molecules is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

460BiologyMedium

What is the average adult Pulse rate?

ANone of these

B72-80

C115-125

D140-150

Correct answer

B. 72-80

Explanation

72-80 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:

AOlder sediment layers did not have these radioactive isotopes

BOlder sediment layers have less amount of these radioactive isotopes as that of the young ones.

COlder sediment layers have equal amount of these radioactive isotopes as that of the young ones

DOlder sediment layers have greater amount of these radioactive isotopes as that of the young ones.

Correct answer

B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones.

Explanation

Whone is not the function of endoplasmic reticulum?

ATransport of material

BNerve impulse conduction

CMechanical support

DSynthesis of conjugated molecules

Correct answer

D. Synthesis of conjugated molecules

Explanation

Synthesis of conjugated molecules is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.