Question # 1

The laptotene and zygotene lasts for.

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Few hours

Few days

Few weeks

Few years

An increase in plant girth due to activity of cascara cambium is called.

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Primary growth

Secondary growth

Heart wood

Sap wood

The enzyme which joins the two pieces of DNA is

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DNA polymerase -I

DNA ligase

Restriction endonuclease

DNA polymerase -I

Bats and humming bird are called

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Heterotherms

Ectotherms

Endotherms

poikilotherms

Etiolated plants grow without.

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Water

Light

O2

CO2

Northern coniferous forest are called.

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Alpine

Boreal

Taiqa

Prairles

Primary succession may start in a dry soil or rock is called.

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Hydrosere

Xerosere

Derosere

Desert

The tumours which are of small size and localized are

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Bengin

Malignant

Gentle

Nasty

The sensation of pain is produced by

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Chemoreceptors

Photoreceptors

Nociceptors

Mechanoreceptors

The Planaria flatworm have simple tubular excretory system known as.

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Protonephridium

Mesonephridum

Prenephridium

Metanephridium

They have adaptations for reduced rate of transpiration.

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Halophytes

Hydrophytes

Mesophytes

Xerophytes

Armadillos the armoured mammals live only in the

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Africa

America

Europe

Asia

A monochromat can perceive

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Three colours

Yellow colours

Only ane colour

Two colours

Apoptosis is.

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Division of cells

Death of cells by tissue damage

suicide of cells

Weakness of cells

In human pair of cranial nerves are

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12

14

16

18

The zoological name of leopard cat is.

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Fells domestica

Felis leo

Feilsbengalensis

Felisparodus

Which pair of chromosome fails to segregate in down's syndrome.

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7th

15th

19th

21st

Buoyancy in the water is maintained by a specialized structure in bony fish called

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Fins

Swim bladder

Tail

Both a & c

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