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4

Polyploid wheat does not normally show an increase in

A. size

B. vigour

C. length of the life cycle

D. resistance to desease

Correct Answer :

C. length of the life cycle


Related Questions

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4

The thermoregulatory centre in the human brain is the

A. Pituitary

B. Spinal cord

C. Cerebellum

D. Hypothalamus

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4

Which among the following is a Cast growing tree?

A. Teak

B. Eucalyptus

C. Banyan

D. Coconut

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4

Spiders can take only

A. solid food

B. liquid food

C. plant juice

D. flesh of dead animals

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4

Life begets life' or biogenesis was stated by

A. Robert Koch

B. Miller

C. Louis Pasteur

D. Lord Lister

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4

Desert plants are called

A. Xerophytes

B. Bryophytes

C. Pteridophytes

D. Halophytes

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4

Plants growing in saline marsh habitats are called

A. Xerophytes

B. Aerophytes

C. Saprophytes

D. Halophytes

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4

The spider spins its web from a liquid secreting from its

A. posterior silk gland

B. posterior abdomen glands

C. mouth

D. salivary glands

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4

In plants water is carried upwards by

A. phloem

B. paranchyma

C. xylem

D. meristem

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4

The part of the brain in Control of Voluntary muscles is

A. cerebellum

B. medulla oblongata

C. pons

D. cerebrum

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4

Viruses have

A. DNA only

B. RNA only

C. Either DNA or RNA

D. Both DNA and RNA

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4

Blood is a kind of

A. epithelial tissue

B. connective tissue

C. nervous tissue

D. cartilage

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4

Pacemaker is the

A. Sinu-auricular node

B. Auriculo-ventricular node

C. Bundle of His

D. Purkinje fibres

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4

Digestion of proteins starts in the

A. mouth

B. stomach

C. duodenum

D. intestine

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4

The plant hormone which promotes ripening of fruits is

A. auxin

B. ethylene

C. gibberellin

D. cytokinin

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4

What are the symptoms of Xeroph-thalmia?

A. eye weakness

B. dry skin and night blindness

C. nervous break down

D. All the above

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4

The waste product In the urine of man is

A. urea

B. uric acid

C. ammonia

D. non-nitrogenous

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4

What are the symptoms of 'Pellagra'?

A. Colour blindness

B. Rickets

C. Patches of skin

D. Soft bones

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4

Temperature treatment which shortens the vegetative period and hastens the flowering is called

A. Phototropism

B. Photoperiodism

C. Vernalisation

D. Thermoregulation

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4

Blood clot Inside blood vessels is prevented by

A. heparin

B. fibrinogen

C. thrombin

D. prothrombin

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4

Biologists have so far known, found and identified a large number of species in the plant and animal kingdom. In terms of numbers, the largest found and identified so far is from among the

A. fungi

B. plants

C. insects

D. bacteria

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4

Coagulation of blood in vessels is prevented during normal circulation by

A. heparin

B. prothrombin

C. plasmogen

D. thromboplastin

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4

Blood pressure is measured by

A. Auxanometer

B. Stethoscope

C. Sphygmomanometer

D. Kaleidoscope

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4

The smallest size of a cell which can be seen directly by the eye is

A. One micron

B. 10 micron

C. 100 micron

D. 1000 micron

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4

Measles and influenza are caused by

A. virus

B. bacteria

C. insects

D. nematodes

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4

The external ears of man are intended for

A. ornaments

B. scattering sound waves

C. collect sound waves

D. beauty

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4

The olfactory area is concerned with

A. smell

B. sight

C. hearing

D. speech

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4

It Is not advisable to sleep under a tree at night because of release of

A. oxygen in a lesser quantity than the required levels

B. oxygen in large amounts

C. carbon monoxide

D. carbon dioxide

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4

Man has ____ pairs of salivary glands.

A. 3

B. 4

C. 6

D. 8

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4

What is the other name for the brain?

A. myelon

B. encephalon

C. cephalon

D. All the above

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4

Necrosis is a symptom which is recognised by

A. pattern colouration on leaves

B. little leaves

C. out growth

D. death of tissues