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Biology Past Questions

Study and practice Biology past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.

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Past Questions

50 questions

Question 1 of 20 50 total questions

Question 1

jamb 1987

The flower shown above is

Acomplete, regular, hermaphroditic with superior ovary

Bincomplete, regular, staminate with inferior ovary

Ccomplete, regular, hermaphroditic with inferior ovary

Dincomplete, irregular, pistillate with superior ovary

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Question 2

jamb 1987

Which of the plants is likely to be desert species?

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Question 3

jamb 1987

Which of the plants is likely to have broad leaves and thin cuticle?

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Question 4

jamb 1987

The process by which lime is added to clay soil is known as

Asedimentation

Bflocculation

Cleaching

Dmanuring

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Question 5

jamb 1987

Nitrifying bacteria are important because they

Arelease nitrogen to the atmosphere

Bconvert atmospheric nitrogen to ammonia

Ccombine ammonia with nitrgen

Doxidize ammmonium salt to nitrates

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Question 6

jamb 1987

One of the functions of UNICEF is to

Aprevent and control major disease

Bprevent diseases outbreak by administering vaccines

Cimprove the health and nutrition of children and nursing mothers

Dmonitir enviromental pollution

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Question 7

jamb 1987

Poliomyelitis is an infectious diseases caused by

Avirus

Bprotozoan

Cbacterium

Dfungus

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Question 8

jamb 1987

Epiphytes growing on the branches of trees provide an example of the relationship known as

Aparasitism

Bcommensalism

Csaprophytism

Dholophytism

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Question 9

jamb 1987

Which of the following relates to edaphic factors?

AThe structure of the earth's surface

BThe influence of living organisms on each other

CTemperature, rainfall and humidity

DThe influence of soils on plant and animals

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Question 10

jamb 1987

In which of the following crosses will all the female offspring be colour blind?

Acolour blind mother x colour blind father

Bcolour blind mother x normal father

Ccarrier mother x colour blind father

Dcarrier mother x normal father

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Question 11

jamb 1987

The ratio of carriers to sicklers in the F₁ generation derived from a parental cross of two carriers of haemoglobin S gene is

A3 : 1

B1 : 3

C2 : 1

D1 : 2

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Question 12

jamb 1987

If a plant homozygous for round and yellow (RR : YY), is crossed with a wrinkle green type (rr : yy) all of the resulting seeds will be

Ablue and wrinkled

Bround and yellow

Cwrinkled and yellow

Dround and greenish yellow

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Question 13

jamb 1987

An example of monohybride inheritance in man is

Aastigmatism

Bcretinism

Chyperthyroidism

Dalbinism

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Question 14

jamb 1987

A gene which expresses itself only in the homozygous condition is

Aa mutant

Bdominant

Crecessive

Dlethal

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Question 15

jamb 1987

Unlike auxins, gibberellins

Ainduces the formation of adventitious roots

Bdo not affect leaf and fruit abscission

Ccannot stimulate stem elongation

Dare quite effective as herbicides

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Question 16

jamb 1987

The center for controlling body temperature in the brains is the

Acerebrum

Bcerebellum

Cmedulla

Dhypothalamus

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Question 17

jamb 1987

The sequence of ear ossicles from the fenestra ovalis is

Amalleus, incus and stapes

Bmalleus, stapes and incus

Cstapes, incus and malleus

Dstapes, malleuls and incus

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Question 18

jamb 1987

The growth of a coleoptile towards unilateral light source is due to

Arapid rate of photosynthesis

Bunequal distribution of auxin

Cthe effect of geotropism

Dthe effect of photolysis

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Question 19

jamb 1987

A severe deficiency of thyroxin results in

Adiabetes mellitus

Bsexual underdevelopment

Ccretinism

Dgigantism

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Question 20

jamb 1987

Most cells in higher animals retain their power of division EXCEPT

Alymphocytes

Bnerve cells

Cmalpighian cells

Dgerm cells

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