Online Test

Question # 1

When a plant was kept in darkness for many days, its leaves turnes yellow. Why?

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Leaves could not yet oxygen and so there was no photosynthesis

Leaves could not get light and so there was no respiration

Leaves could not get oxygen and so there was no respiration

Leaves could not get light and so there was no photosynthesis

When stomatal opening reduce in sixe, the rate of transpiration ............... .

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Transpiration

Transcription

Translation

Allof above

Taxon of Order was introduced by:

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Carolous linnaeus

John Ray

Augustus Rivinus

Aristole

Species that are in the same______are more closely related then,

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Phylum.......class

Family.......order

Class.... order

Family.......genus

................. teeth are adopted for cutting.

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Parmanenet

Premolars

Incisor teeth

Canine teeth

Robert Hooke able to magnify thin slices of cork .......... times.

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10

20

30

40

Human body is made up how many types of cells?

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200

300

400

500

What is greatest threat to biodiversity on this planet?

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Habitat loss

Deforestation

Overpopulation

B and C

Which one of these in "not" a characteristic of hypothesis?

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Must be consistent with all available data

Must be testable

Must be correct

Must predictions

Forests are the source of:

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Drugs

Fuel

Timber

All of these

Normal rate of heart beat in a healthy human being is ......... beats per minute.

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72

73

70

75

In turner's syndrome female have ................. chromosomes .

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46

45

47

22

The phenomenon of spread of tumor is called:

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Malignant

Benign

Metastasis

Mitosis

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