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4

The plants will stop growing if the shoot tip is cut off because

A. shoot tip produces growth hormones

B. shoot tip contains meristematic cells

C. shoot tip is the growing part

D. the plant dies

Correct Answer :

A. shoot tip produces growth hormones


Related Questions

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4

Cancer cells are more easily damaged by radiation than normal cells because they are

A. different in structure

B. non-dividing

C. starved of nutrition

D. undergoing rapid division

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4

Legumes are highly nutritious because they are rich in

A. starch

B. oils

C. fat

D. protein

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4

Kwashiorkar is a deficiency disease

A. due to poor intake of proteins

B. due to poor intake of carbohydrates

C. due to (a) and (b)

D. due to poor intake of lipids

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4

The phenomenon of summer sleep by animals is called

A. hibernation

B. aestivation

C. laziness

D. lethargy

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4

What are oncogenes?

A. a dominant gene

B. a set of genes which produce cancer

C. a gene present in the X-chromosomes causing haemophilia

D. a recessive gene

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4

Pulse rate is measured in the wrist by observing the jerks of blood In the

A. veins

B. capillaries

C. arteries

D. nerves

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4

One of the following disease cannot be prevented by the DPT (triple-antigen) immunization of children.

A. Tetanus

B. Tuberculosis

C. Whooping cough

D. Diphtheria

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4

Malarial parasite is brought to human host by

A. male anopheles mosquito

B. female anopheles mosquito

C. male culex

D. female culex

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4

The endocrine glands secrete

A. bile

B. harmones

C. sweat

D. genes

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4

Bird nu is a disease which affects and spreads through

A. Cattle

B. Sheep

C. Prawn

D. Poultry

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4

Saffron is the dried ________ of the saffron plant.

A. fruit

B. aril

C. stigmas and tops of styles

D. tender leaves and sprouts

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4

The muscles of the heart are

A. striated and involuntary

B. striated and voluntary

C. smooth and involuntary

D. smooth and voluntary

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4

A person with a blood group ____ is considered to be an universal donor.

A. A Positive

B. AB Positive

C. AB Negative

D. O Positive

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4

The organ that produces antibodies in our body is

A. pancreas

B. salivary gland

C. liver

D. gonads

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4

Biological control is to check growth of

A. plants

B. animals

C. weeds

D. one pest by another

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4

Bacteria utilising radiant energy to prepare food are

A. chemosynthetic bacteria

B. heterotrophic bacteria

C. photosynthetic bacteria

D. free living bacteria

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4

The bile contains the pigments

A. haemoglobin and haemoerythrin

B. biliviridin and bilirubin

C. bilirubin and haemocyanin

D. haemoglobin and biliviridin

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4

Which among the following is the best source of proteins?

A. apples

B. butter

C. beans

D. fish

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4

The life cycle of Malarial Parasite consists of two phases in man. Where do they occur?

A. In RBC and liver cells

B. In WBC and RBC

C. In lymph

D. In gall bladder and pancreas

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4

Diseases in plants can be caused by

A. virus

B. bacteria

C. fungi

D. All the above

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4

Damage to hearing is caused by sounds which exceed

A. 70 decibels

B. 80 decibels

C. 100 decibels

D. 120 decibels

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4

Which one of the following cells helps in storing water and food materials?

A. Parenchyma cell

B. Flame cell

C. Nematoblast

D. None of the above

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4

Which of the following organelles is known as the 'power House' of the cell?

A. Golgi Bodies

B. Ribosomes

C. Mitochondria

D. None of these

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4

Plant diseases are spread by

A. insects

B. man

C. wind

D. All the above

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4

A plant cell is distinguishable from an animal cell by the presence of

A. nucleus

B. cell wall

C. chloroplasts

D. cell membrane

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4

Sex linked genes are carried by

A. X-chromosomes

B. Y-chromosomes

C. different part of X- and Y-chromosomes

D. autosomes

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4

Scurvy is prevented by vitamin

A. A

B. B

C. C

D. D

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The theory that all animals and plants are made up of cells and they could arise only from pre-existing cells was propounded by

A. Robert Hooke

B. Matthias Schleiden and Theodore Schwann

C. Purkinije

D. Leuwenhoek

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4

The most accepted theory of the origin of earth is the fiery origin which was propounded by

A. Laplace

B. Chamberlain

C. James Jean

D. Hoyle

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4

In a gamete there will be

A. one pair of sex chromosomes

B. only one sex chromosome

C. no sex chromosome

D. only autosomes