A tall garden pea plant was crossed with a dwarf garden pea plant.

a) Given that the allele ‘d’ for dwarfness is recessive, write the genotype of the offspring if the tall garden pea used was:                                                                               (2mks)

Pure breed ………………………………………………………………………………

Heterozygous …………………………………………………………………………...

b) Write the base sequence of the DNA from which the messenger-RNA shown below was derived. ACUGAACCGUAU                                                                              (1mk)

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The picture below shows a disorder that affects blood vessels in humans

(a) Name the disorder shown above                                                                                (1mk)

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(b) Which blood vessel is affected by this disorder?                                                       (1mk)

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a) Name the salivary gland found beneath the tongue                                               (1mk)

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b) Outline two ways in which saliva is suited to its function                                 (2mks)

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Explain the ways by which movement of the ovum is achieved along the oviduct.      (2mks)

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The following data was collected from study of same crop grown in different temperature 

(a) Which is the ideal temperature for the growth of this crop?                          (1mk)

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(b) Account for the yield obtained in plot D                                                (2mks)

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The diagram below shows the root of a leguminous plant

(a) Name the bacterium found in the root nodules                                                          (1mk)

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(b) How are the bacteria named in a) important to the legume?                         (1mk)

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Learners suspected that a liquid they found in the laboratory contained starch

(a) Describe a procedure they will use to determine whether starch was present            (2mks)

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(b) State the expected colour change for them to conclude that starch was present       (1mk)

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(c) What is the advantage of plants storing carbohydrates as starch?                 (1mk

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Name the tissue that forms the following hormones                                                  (2mks)

(a) Glucagon ………………………………………………………………………………

(b) Progesterone ……………………………………………………………………………

A plant cell was placed in solution X and after a while it appeared as cell B shown below

(a) Which two features show that cell B is plasmolysed?                                            (2mks)

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(b) Which process facilitated the presence of solution X in part P?                                (1mk)

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(c) What is the nature of solution X?                                                                               (1mk)

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Fill the table below to show differences between guttation and transpiration            (2mks)