Question # 1

There are more than _____________ million kinds of living organism.

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1

2

3

4

Exchange of water vapours and gases occurs in leaf through:

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Stomata

Epidermics

Xylem

Phloem

The rate of transpiration is increased when:

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Low light

Temperature decrease

Humidity increased

None of these

Where are the villi found?

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Esophagus

Stomach

Small intestine

large intestine

Scanning electron microscope gives .................. image.

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1D

2D

3D

All

Goiter is a disease caused as a result of deficiencies of ........... .

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Iodine

Iron

Calcium

Phosphorus

.......... is the most abundant .

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Chlorophyll a

Chlorophyll b

Chlorophyll c

Chlorophyll d

The reactions which do not require light during photosynthesis are called __________ reactions.

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Chemical

Redox

Dark

Light

There are _________ P-bonds in an ATP molecule.

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Two

Nine

Six

Four

Down's sayndrome is an autosomal non-disjunction of chromosomes number ............. .

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22

12

21

14

The microscopic study of tissues is called.

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Physialogy

Morphology

Histology

Entomology

Micro filaments are made of:

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Tubulin protein

Lipids

Carbohydrates

Actin protein

Magnification of electron microscope is:

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2500 x

250,000 x

25000 x

None

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