Question # 1

An ordered sequence of irrversible steps with each step setting up the necessary conditions for the next step is

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Embryology

Growth

Development

None of these

Promotes closing of stomata under conditions water stress.

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Etthene

Abscisic acid

Cytokinnins

Gibberellins

The means by which recombinant DNA is introduced into a host call is called

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Plasmid

Carrier

Vector

Lifter

Each bivalent has

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Twochromatids

Four chromatids

Both a & b

None of these

Hypoblast is mainly presumptive

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Endoderm

Mesoderm

Ectoderm

Blastoderm

in plants regeneration is the basis of plant

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Fishes

Amphibian

Reptiles

Birds

Zoos and botanical gardens are to save species whose extinction is.

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Imminent

Prominent

Parmanent

dominant

In which of the following situations would evoluation be lowest for an inter breeding population?

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Migration Selection Pressure Variation(Due to Mutation) Absent Low Low

Migration Selection Pressure Variation(Due to Mutation) Absent High High

Migration Selection Pressure Variation(Due to Mutation) High Low High

Migration Selection Pressure Variation(Due to Mutation) High High Low

The temperature more effective for vernalization is

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4 ^oC

8^oC

12^oC

16^oC

The kinetochore fibres of spindle attach to the kinetochore region of chromosome and align them at the equator of the spindle forming

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Equatorial plate

Metaphase plate

Central plate

Both a & b

If the two generations are vegetatively similar such alternation of generation is referred to as

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Homomorphic

Isomorphic

Heteromorphic

Eumorphic

The numebr of cervical vertebrae are.

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7

12

33

32

Syphilis is caused by a spirochete named as.

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Nisseria gonorrhea

Theponemapallidum

Escherichia coli

Hypomicrobium

Between the seminiferous tubules are interstitial cells which secrete

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Cestrogen

Testosterone

Progesterone

Oxytocin

Which one of the following pairs represents analogous features?

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Elephant tusks & Human incisors

Insects wings & bat wings

Mammal fore limb & bird wing

Reptilian heart & mammalism heart

Bundle caps in sunflower stem, are formed by

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Sclerenchyma

Parenchyma

Mesenchyma

Collenchyma

Principles of geology was published by.

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Darwin

Lyell

Linnaeus

Lamarck

The number of spinal nerve in man is.

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12

30

31

24

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