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Below is a diagram showing the fore arm bones and muscles covering them.
a) Name the bones represented by; T X Y Z
b) Name the joints formed between;
i) T and X
ii) Y and X
c) Name the muscles labeled P and R.
d) What happens to each muscle as the arm is straightened.
P...................
R..................
Date posted:
November 13, 2019
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A solution of sugar cane was boiled with a small amount of dilute hydrochloric acid and allowed to cool. Sodium hydrogen carbonate solution was added drop by drop until the fizzing stopped. A few drops of benedicts solution were added to the mixture and boiled. An orange precipitate formed at the end of the experiment.
a) What was the role of the following in the experiment;
i) Dilute hydrochloric acid.
ii) Sodium hydrogen carbonate.
b) What conclusion can be drawn from the above experiment?
c) Where was the food substance identified in the experiment produced?
d) Name the substance found in human digestive system that performs the same function as Hydrochloric acid.
e) State two properties of the substance identified in (b) above.
Date posted:
November 13, 2019
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Below is a diagram of an organism
(a) Identify the kingdom to which the organism belongs.
(b) State the functions of the structures labelled F and G.
(c) Name the material that makes the cell wall of the organism.
Date posted:
November 13, 2019
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The diagram below shows some growth in a plant.
a) Name the type of growth shown in the diagram.
b) Name the part labeled A
c) What is the function of the part labeled B
Date posted:
November 13, 2019
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State two ways through which proteins are assimilated in the body
Date posted:
November 13, 2019
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Explain why a rat has a higher food intake compared to a lizard of the same body weight.
Date posted:
November 12, 2019
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Why is a pyramid of biomass a more accurate way of representing the amount of organic matter present in each trophic level as compared to the pyramid of numbers?
Date posted:
November 12, 2019
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The diagram below represents a section through a chloroplast as seen under the electron microscope.
(a) Name the structure labelled D.
(b) In which labelled structure do we find chlorophyll molecule.
(c) Name the structure labelled, where carbon IV oxide fixation occurs.
Date posted:
November 12, 2019
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Explain why movement of air molecules is not energy driven process.
Date posted:
November 12, 2019
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The figure below shows change in dry mass of germinating bean seeds with time.
Account for the;
(i) Decline in dry mass between A and B.
(ii) Rapid increase in dry mass between C and D.
Date posted:
November 12, 2019
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The diagram below represents a cell organelle as seen under electron microscope.
(i) Identify the organelle.
(ii) State the function of the organelle named in (i) above in the cell.
(iii) State one visible adaptation that makes it suitable to perform its function.
(iv) Name one cell that has a large number of the organelle named in (i) above.
Date posted:
November 12, 2019
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State the structural differences between the xylem and phloem.
Date posted:
November 12, 2019
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The diagram below represents a kidney nephron.
(a) Name the parts labeled G, and H.
(b) Name the process that takes place in the glomerulus.
(c) Name the substances that are reabsorbed into the blood at the part labeled J.
(d) A patient was found to pass out large volumes of dilute urine.
(i) State the disease from which the patient was suffering from.
(ii) What is the cause of the disease stated in (d) (i) above?
(e) Name substance K.
Date posted:
November 7, 2019
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Work out the chance that a son of a normal man and a woman who is a carrier for haemophilia will be a haemophiliac. Let the gene for normal blood clotting be H.
Date posted:
November 7, 2019
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The diagram below represents a germinating seedling.
(i) State the type of germination shown in the diagram.
(ii) Name the part labeled E.
(iii) What is the function of the endosperm labeled F?
Date posted:
November 7, 2019
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The diagram below represents a human digestive system.
(a) Name the muscles found in the part labeled A.
(b) Name and explain the role of the juice contained in the sac labeled B.
(c) Explain two adaptations of the part labeled D to its function.
Date posted:
November 7, 2019
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Explain why there are only a few days in each menstrual cycle when fertilization can occur.
Date posted:
October 31, 2019
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A person who is blood group AB has an advantage over a person who is blood group O. Explain.
Date posted:
October 31, 2019
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The diagram below represents a longitudinal section of a bean study it and answer the questions that follow:
a) Identify the parts labeled A to D.
b) Give the role of the plant labeled D.
c) What type of germination would the seed shown above undergo?
Date posted:
October 31, 2019
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The diagram below represents a section or portion of a certain nucleic acid.
With a reason, identify the types of nucleic acid whose portion is shown above
Identity
Reason
Date posted:
October 9, 2019
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The table below shows the percentage composition by volume of inhaled and exhaled air.
(a) By what percentage is carbon (iv) oxide concentration in inhaled air higher than exhaled air.
(b) Explain the differences in the composition of the gases between inhaled and exhaled air.
Date posted:
October 9, 2019
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In a blood test, a few drops of anti- serum were added to two samples of blood. It was observed that agglutination occurred. What were the possible blood groups of the two blood samples?
Date posted:
October 9, 2019
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The following is a diagrammatic representation of protein synthesis. Study and answer the questions that follow.
(a) Name process R
(b) Where in the cell does R take place?
(c) Name
(i) Product Q
(ii) Part X
Date posted:
October 9, 2019
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Name the parts of the body of a mammal where each of the following types of joints are found.
(i) Fixed joints
(ii) Gliding joint
(ii) Huge joint
Date posted:
October 9, 2019
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a)When observing a specimen through a light microscope, a student noted that the field of view was dark. Name 2 parts of the microscope that the student should adjust to make the field of view clear.
b) A specimen was magnified 1000 times by a light microscope whose eye piece lens magnification is x10. Calculate magnification of objective lens.
Date posted:
October 9, 2019
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The following graph represents a growth pattern observed in a group of animal.
a) Name the type of growth shown above.
b) Name the phylum of animals whose members display the growth pattern named in (a) above.
c) Identify the process which leads to increase in body size at the part marked S.
Date posted:
October 9, 2019
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The table below shows how the width of the stomata and the wind speed can affect the rate of transpiration from a leaf of a plant. The width are measured in micrometers (nm)
a)plot a graph of rate of transpiration against width of the stomata.
(b) Use your graph to predict the rate of transpiration when the stomata have a width of 8nm.
(c) Describe the relationship between the width of stomata and the rate of transpiration in still air.
(d) Explain why the rate of transpiration in wind differs from rate in still air.
(e) Explain why transpiration is important in plants.
Date posted:
October 9, 2019
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The diagram below represents a transverse section through mammalian skin.
(a) Name the structures A and B .
A
B
(b) (i) Explain how the hair in human beings helps in keeping the body warm .
(ii) Explain other methods by which the skin helps to keep the body warm.
Date posted:
October 9, 2019
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The following is a diagrammatic representation of a dissection of a rabbit showing the urinogenital system.
a)name the structures labeled P, Q, S and T. For each of the structures, state one function.
b)
i) Identify the sex of the rabbit that was dissected
ii) Give two reasons for your answer in b(i) above
c) Name the instrument labeled x in the diagram above
Date posted:
October 8, 2019
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Study the diagram below and answer the questions which follow.
i) Identify the muscle represented by X and Y
ii) Describe how muscles x and y cause straightening of the joint z
iii) Name the joint z
Date posted:
October 8, 2019