Question # 1

250 years age, the population of world was approximately ------------ million.

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400

500

600

700

One organism kills and feed on other organism is called.

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Predation

Parasitism

Mutuatism

Commensalism

Genes are cut from DNA.

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Ligase

Restriction endonuclease

Urokinesis

Lipase

Charles Darwin published a book "on the origin of species by means of Natural Selection" in:

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1858

1859

1889

1890

Double fertilization in plants means:

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Fusion of two sperm with two egg cells.

Fusion of one sperm with egg cell and other sperm with fusion nucleus

Fusion of two sperm with single egg cell

Fusion of tube nucleus with fusion nucleus and sperm egg cell

A group of organisms of the same species inhabiting a species geographical area ta a particular time is called:

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population

community

ecosystem

species

The hormone which increase the rate of reabsorption of water form nephorn is:

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glucagon

insulin

vesoporession

epineophrine

Essential process for continuation of species is:

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Reproduction

Cloning

Respiration

Locomotion

The function of male and female gametes is called:

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fertilization

pollination

propagation

reproduction

Amount of nitrogen in expired air is:

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70%

80%

79%

4%

Alternatives forms of a gene are called:

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Allele

DNA

Chromosome

Gamete

Sulfonamides affect bacteria in the following way:

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Break the cell wall

Inhibit protein synthesis

Stop the synthesis of new cell wall

Stop the synthesis of folic acid

Inflammation of membrane at joints is called.

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Osteoarthrits

Rheumatoid arthritis

Arthritis

Gout

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