Question # 1

The cells which supply ATP and proteins to sleve tubes are.

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Companion

Trachelds

Vessels

epidermal

Which of the following is not true for guard cells.

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Present in epidermis

Lack chloroplast

Bean like

Kidney shaped

Temperature causes closure of stomata.

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30-40 ^oC

30-35^oC

40-45^oC

25-35^oC

In normal human body percentage of plasma in blood volume is.

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45%

30%

55%

60%

Which of the following is not true about histamine.

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Produced by basochills

cause inflammation

Causes dilation of blood capillaries

Released by Eosinophils

A substance that inhibits blood clotting is.

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Heparin

Fibrin

Fibrinogen

Thrombin

The Casparian strips are present in

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Cortex cells of roots

Endodermal cells of roots

Cells of xylem

Cellf of phloem

The plasma proteins constitute percent by weight of plasma.

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7.9%

9-11%

11-13%

13-15%

All have open blood circulatory system except.

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Snail

Calms

Insects

Octopus

Shrinkage of protoplast due to ex osmosis of water is called.

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Plasmolysis

Imbibition

Guttation

Bleeding

Platelets are not cells, but are fragments of large cells called.

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Microkaryocytes

Karyocytes

Megakaryocytes

None of these

Normal pH of human blood is.

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4.4

5.4

6.4

7.4

The left systemic arch disappears in

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Fish

Reptile

Mammals

Birds

Open circulatory system is present in.

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Man

Leach

Earth work

Cockroach

The structure involved in guttation are.

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Cuticle

Hydathodes

Lenticle

Stomata

Guttation occurs in plants through.

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Cutitle

Hydathodes

stomata

Lenticels

In Hydra ectodermal cells get food from endodermal cells by

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Endocytosis

Exocytosis

Both a and b

Diffusion

The pressure flow theory was first proposed in 1930

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Emst hackel

Ernst Munch

Dixon

Hemming

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