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Transport - Jamb Biology Past Questions and Answers

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Jamb Biology Past Questions

Question 16:


If the bark and phloem tissue of a woody shoot are peeled off by ringing, the whole plant will die eventually die because?

A. Water does not reach the leaves
B. Water and salts remained below the ring portion
C. There is a withdrawal of water from the root by soil
D. Manufactured food does not reach the roots
E. The roots store too much water


Question 17:


The rate of transpiration of a leafy shoot would be highest under

A. Damp, cold, still air
B. Damp, warm, moving air
C. Dry, warm, moving air
D. Dry, cold, moving air
E. Dry, warm, still air


Question 18:


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

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


Question 19:


In an angiosperm leaf, the xylem is

A. Beside the phloem
B. Surrounded by trhe phloem
C. Above the phloem
D. Around the phloem
E. In separate bundles from the phloem


Question 20:


The stem differs from the root in having the xylem and phloem strands

A. On the same radii
B. Scattered
C. On alternate radii
D. Towards the pith






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