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Describe the adaptations of the guard cells to opening and closing of stomata.
Date posted:
August 5, 2019
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Differentiate between the mode of fertilization in higher plants and in mammals.
Date posted:
August 5, 2019
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Describe the hormones involved in menstrual cycle and their roles
Date posted:
June 28, 2019
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Explain the effects of population migration.
Date posted:
June 25, 2019
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Explain why genetic counseling is termed as one practical application of genetics
Date posted:
June 25, 2019
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Distinguish between tendons and ligaments
Date posted:
June 18, 2019
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State how natural active acquired immunity is attained by an individual
Date posted:
June 18, 2019
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State the role of spleen in human defense mechanism
Date posted:
June 18, 2019
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Name one secondary sexual characteristic common to both males and females
Date posted:
June 18, 2019
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Describe the varying events that follow a flower after fertilization.
Date posted:
June 18, 2019
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The eggs of birds are relatively much larger than those of mammals. Explain
Date posted:
June 18, 2019
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State one feature of pollen grains from a wind pollinated flower
Date posted:
June 18, 2019
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State the functions of the following parts in the male reproductive system
(a) Semniferous tubules
(b) Sertoli cells
Date posted:
June 18, 2019
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State two major structural differences between fruit and a seed
Date posted:
June 18, 2019
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State three ways in which seed dormancy benefits a plant
Date posted:
June 18, 2019
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Name the hormone that:
(a) Stimulate the contraction of uterus during birth.
(b) Stimulate the disintegration of corpus luteum when fertilization fails to take place.
Date posted:
June 18, 2019
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Name two nuclei found in pollen grains.
Date posted:
June 18, 2019
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State the role played by Heterostyly in plants.
Date posted:
June 18, 2019
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Differentiate between monoecious and dioecious plants
Date posted:
June 18, 2019
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State two importance of meiosis in living organisms.
Date posted:
June 18, 2019
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At what stage of meiosis is the chiasmata formed?
Date posted:
June 18, 2019
-
Explain the role of chlorophyll in photosynthesis
Date posted:
June 18, 2019
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Name the protective membranes surrounding the brain
Date posted:
June 18, 2019
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Name two factors in the environment which organisms respond to
Date posted:
June 18, 2019
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Donkey and zebra are closely related yet not of the same species. Explain
Date posted:
June 18, 2019
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The calyx cells of a certain plant has 22 chromosomes. State the number of chromosomes
present in the plant’s
i) Endosperm
ii) Ovule cell
Date posted:
June 18, 2019
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Why is sexual reproduction important in evolution of plants and animals?
Date posted:
June 18, 2019
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Explain why menstrual periods stop immediately after conception?
Date posted:
June 18, 2019
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Name the type of placentation where;
(i) Placenta appears as one ridge on the ovary wall
(ii) Placenta appears at the centre of the ovary with ovules on it and the dividing walls of carpels
disappear
Date posted:
June 18, 2019
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Explain why a pregnant woman is supplied with doses of iron tablets regularly
Date posted:
June 18, 2019