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Biology Past Questions and Answers

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Biology Questions

Question 301:

Which of the following statements is NOT true of mammalian erythrocytes?

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A They have haemoglobin
B They appear yellow when looked at singly
C They are disc shaped
D The cell are more numerous than leucocytes
E They have nuclei at maturity

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Question 302:

In woody plants, grass and water vapour are transported across the stems by the

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A Xylem fibres
B Medullary rays
C Sieve tubes
D Phloem fibres
E Phloem parenchyma

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Question 303:

Which of the following substance is not found in urine?

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A Water
B Sodium chloride
C Nitrogenous compounds
D Calcium chloride
E Nitrogenous salts

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Question 304:

The kidneys of all vertebrates act as osmoregulators. This means that they

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A Keep the composition of the plasma constant
B Regulate osmotic processes
C Control the volume of blood entering the kidneys
D Decrease the osmotic pressure of the blood
E Increase the osmotic pressure of blood

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Question 305:

The movement of plant in response to external stimulus of no particular direction is

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A Taxism
B Tropism
C Hyptotropic movement
D Nastic movement
E Phototropism

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