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Give an example of a beneficial mutation in plants.
Date posted:
September 13, 2019
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(a) Given a sample of urine, name one test you would carry out to determine if it was obtained from a person suffering from diabetes mellitus.
(b) What results are expected if one is diabetic?
Date posted:
September 13, 2019
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A goat weighing 20kg requires 216KJ while a mouse weighing 54gms requires 2830KJ per day. Explain.
Date posted:
September 13, 2019
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In a prolonged drought period, forage was scarce. It made animals reach out for higher forage and this way the giraffes got the stretched long necks.
(a) What is the term used for a characteristic such as the long necks outlined?
(b) What is the name given to the theory that describes the evolution of such structures like the long necks?
(c) State and explain the limitation of the theory you named in (b) above.
Date posted:
September 13, 2019
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The table below shows differences in air breathed in and out.
What is the reason for there differences.
Date posted:
September 13, 2019
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Which substance in the cigarettes smoke may cause lung cancer.
Date posted:
September 13, 2019
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Mr. Juma has sued Serenity Hospital on grounds that their child was wrongly identified such that they got the wrong one.The child is blood group O. Mr. Juma is blood group AB while Mrs. Juma is heterozygous blood group A.
(a) Work out the possible blood group of their offsprings.
(b) Is Mr. Juma justified in his claims?
Date posted:
September 13, 2019
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The diagram below show single circulation of a fish.
(a) Write down the names of the parts labelled T,U and V.
(b) Explain the main disadvantage of this type of circulation.
(c) How is this type of circulation different from that found in man?
Date posted:
September 13, 2019
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The table below shows approximate numbers of organisms found in an ecosystem.
(a) Using the information in the table draw a pyramid of numbers.
(b) Explain what would happen to the other organisms if all the lizards suddenly died off.
Date posted:
September 13, 2019
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The photographs labelled K, L, M, N and P below are bones obtained from a mammal. For each of the bones K, L and M, two views are shown.
(a) Identify the bones and name the part of the mammalian body from which each was obtained. (5mks)
(b) Name the parts labelled 1, 2 and 4.
(c) Name the bones that form a joint with bone K at its anterior and posterior end
and in each case name the type of joint they form.
Anterior end.
(i) Bone(s)
(ii) Type of joint
Posterior end.
(i) Bone(s)
(ii) Type of joint
(d) State the function of the structure labelled 6 in bone P.
Date posted:
September 13, 2019
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Name the hard body covering found in organisms of the phylum arthropoda.
Date posted:
September 13, 2019
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Write the kingdoms to which the following organisms belong.
Plasmodium
Bat
Yeast
Date posted:
September 13, 2019
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A student collected a plant with the following features:
-Vascular bundles in the stem were scattered with no cambium.
-Fibrous root system.
Name the sub-division and the class to which the above plant belonged.
Sub-division
Class
Date posted:
September 13, 2019
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Name one waste product that is transported in the blood but not removed by the kidneys.
Date posted:
September 13, 2019
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Arrange the following nitrogenous waste products in order of decreasing toxicity:
urea, uric acid and ammonia.
Date posted:
September 13, 2019
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Name two substances that are excreted through diffusion process in plants.
Date posted:
September 13, 2019
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Explain why the garden pea plant was preferred by Gregor Mendel in his crossing experiments.
Date posted:
September 13, 2019
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Potato cylinders were weighed and kept in distilled water overnight. They were then reweighed.
(a) Calculate the average mass of the potato cylinders at the end of the experiments.(Show your working).
(b) Explain why the mass of the cylinders had increased.
Date posted:
September 13, 2019
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What is the importance of fixation in preparation of temporary slide?
Date posted:
September 13, 2019
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Give one structural difference and similarity between a mitochondrion and a chloroplast.
Date posted:
September 13, 2019
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Explain why athletes practicing at high altitude zones have a higher number red blood cells than those at sea level.
Date posted:
September 13, 2019
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Below is across section of a fruit.
(a) Name the type of placentation shown.
(b) Identify the parts labelled A.
Date posted:
September 13, 2019
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Explain why emulsification is not a chemical digestion.
Date posted:
September 13, 2019
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The diagram below shows a transverse section of a spinal cord.
Name the parts labelled A – D.
Date posted:
September 13, 2019
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Name the structure for gaseous exchange in
(a) Tadpole
(b) Grasshopper
Date posted:
September 13, 2019
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The table below shows organisms in a given habitat.
a) Calculate the total number of producers.
(b) Name the organisms that could be both primary and secondary consumers.
(c) Name the process through which energy from the sun is incorporated in the ecosystem.
(d) State why decomposers are not included in the food chain.
Date posted:
September 13, 2019
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Study the diagram below and answer the questions that follow:
(a) Identify the above apparatus.
(b) State the function of the above apparatus.
(c) Name an apparatus that can be used for catching insects on barks of trees or rock surfaces.
(d) Name the branch of Biology that deals with the study of birds.
Date posted:
September 13, 2019
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Below are photographs labeled B and C of organs obtained from different animals. The organs perform similar functions.Examine them and answer the questions that follow.
a) Name the organs B and C.
b) State the common functions performed by the organs stated above.
c) Name the parts labeled B1, B2 and B3 in the photograph B.
d) i) Identify the parts labeled K1,K2,and K3 in photography C
ii) Using observable features; state how the parts labeled K1 and K3 you identified in d (i) above are adapted to their function.
Date posted:
September 13, 2019
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You are provided with a photograph of F and M. Use them to answer the questions that follow
a) What type of flower is
i) F
ii) M
b) Name the agents of pollination for each.
c) State how each of them is adapted for the mode of pollination you have stated in (b) above.
d) Name parts labeled P,U,X and Y
Date posted:
September 13, 2019
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The diagram below indicates an organism that grows under shaded places with damp conditions. Study it and answer the questions that follow.
a) Name the division to which the specimen belongs.
b) Name the parts labeled Q, R and S.
c) State the functions of the parts labeled Q and S
d) Name the two body forms of the organism in its alteration of generations.
Date posted:
September 13, 2019