Question # 1

A chromosome with unequal length of its arm is called:

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Metacantric

Sub metacentric

Acrocentric

Telocentric

Okazaki fragments are about 1000 - 2000 nucleotides long in

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Prokaryotes

Eukaryotes

Both a & b

None of these

The gens found in a breeding population constitute.

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Genotype

Genome

Gene frequency

Gene pool

The parts of the body used extensively to cope with the environment become larger and stronger while those that are not used deteriorate was argued by

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Charles Drawin

Alfred Wallace

Carolus Linnaeus

J.B Lamarck

Nociceptors produce sensation of

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Touch

Pain

Warmth

Pressure

In case of overheating the body temperature is regulated by:

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More sweating and more urination

Less sweating and more urinattion

Less sweating and less urinattion

Oviduct opens into

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Uterus

Cervix

Vagina

Bladder

Among vertebrates uric acid is the chief nitrogenous waste in birds and

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Fishes

amphibians

Reptiles

Mammals

Human skin colour is also a quantitative trait which is controlled by

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3 - 6 gene pairs

1 - 3 gene pairs

None of these

The process of moulting is controlled by the nervous system and a hormone called.

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Aldosterone

Ecdysone

Oxytocin

Androgen

Karyb. Mullis developed the polymerase chain reaction in.

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1963

1973

1983

1993

The condition in which biennial and perennial plants are stimulated to flower by exopod to low temperature is called.

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Photoperioclism

Vernalization

Apomixis

Partheiogenesis

Pathway of passage of impulse during reflex action is called.

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Reflex

Reflex arc

Stimulus

Membrane potential

Perhaps the most fragile of all the biomes, because of its short growing season is.

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Tundra

Desert

Grass land

Temperate deciduous forest

The protective coat which surrounds the embryo is known as:

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Amnion

Chorion

Allantosis

Chorio Allantoic

A plant is adapted to remove the flooding of its cells in fresh water.

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Mesophyte

Cactus

Hydrophyte

Xerophyte

In myelinated neurons the impulse jumps from node to node (node of Ranvier) This is called

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Myelinated impulse

Jumping impulse

Saltatory impulse

None of these

Each bivalent has

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Twochromatids

Four chromatids

Both a & b

None of these

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