a) A-secretion of sebum
D- production of sweat rej. Secrete for production
b) i) it contract causing the hair to stand erect trapping air
ii) it vasocontrict reducing the amount of blood flowing next to the skin.
c) Addiction /accumulation of dead cells to the hair root.
d) Secretion of sebum which is antiseptic production of melenin
sharon kalunda answered the question on September 17, 2019 at 09:38
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Four cylinders of potato were carefully dried on blotting paper and weighed. Each piece weighed 3g. One was placed in each as shown in the...
(Solved)
Four cylinders of potato were carefully dried on blotting paper and weighed. Each piece weighed 3g. One was placed in each as shown in the drawing below.
a) After 48hours, which potato would be the heaviest
b) Name the substance whose movement was responsible for the weight changes in potato cylinders.
c) Name the process which was responsible for this movement in tubes B, C and D.
Date posted:
September 17, 2019
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Answers (1)
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The following chart illustrates the quantity of urine passed out by three animals of different species in different habitat.
(Solved)
The following chart illustrates the quantity of urine passed out by three animals of different species in different habitat.
a) Name the forms in which the following organisms are likely to excrete their nitrogenous wastes.
Animal B
Animal C
b) Give two structural modification of the animal B that enables it to survive in its habitat.
Date posted:
September 17, 2019
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Answers (1)
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The diagram below represents the urinary system of a mammal. Study it carefully and answer the questions that follow.
(Solved)
The diagram below represents the urinary system of a mammal. Study it carefully and answer the questions that follow.
a) Name the parts labeled C, D and E.
b) i) Identify the part labeled A.
ii) State the hormone produced by the part you have identified in b(i) above and its function.
c) Which of the blood vessels (B and F) contains:
i) A higher concentration of urea.
ii) Lower concentration of oxygen.
d) State how the nephrons of desert mammals are structurally adapted.
Date posted:
September 17, 2019
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Answers (1)
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Study the photographs labeled K and L which were obtained from the same plant.
(Solved)
Study the photographs labeled K and L which were obtained from the same plant.
i) Identify the sub-division to which they belong.
ii) Give reasons for your answer.
iii) Identify the reproductive structure represented in K and L.
Date posted:
September 17, 2019
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Answers (1)
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Which part of the brain regulates body temperatures in mammals?.
(Solved)
Which part of the brain regulates body temperatures in mammals?.
Date posted:
September 17, 2019
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Answers (1)
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The diagram below represents a human arm. Study it and answer the questions that follow.
(Solved)
The diagram below represents a human arm. Study it and answer the questions that follow.
a) Name bone T and R
b) Name muscle C and D
c) i) Identify the fluid found at joint 2.
i) State the function of the fluid in (i) above.
d) i) What is the type of the joint found at part labeled 1.
ii) Differentiate between a tendon and a ligament.
Date posted:
September 17, 2019
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Answers (1)
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In an experiment, Euglena was put in a petri dish. One side of the petri dish was illuminated and the other kept dark as shown...
(Solved)
In an experiment, Euglena was put in a petri dish. One side of the petri dish was illuminated and the other kept dark as shown below.
a) Name this type of response.
b) State the significance of this type of response in an organism.
c) Other than light, outline other two factors that may cause change of position in Euglena and state the respective type of response.
d) If the above experiment was repeated using a young potted seedling, name the type of response which will be observed.
e) Explain the behavior of the seedling after 3 days.
Date posted:
September 17, 2019
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Answers (1)
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Plants with red flowers were crossed with plants with white flowers. The resultant F1 generation had pink flowers.
(Solved)
Plants with red flowers were crossed with plants with white flowers. The resultant F1 generation had pink flowers.Plants with red flowers were crossed with plants with white flowers. The resultant F1 generation had pink flowers.
a) Using R for red flowers and W for white flowers, work out the genotypes of F2 generation.
b) Determine the genotypic ratio of F2 generation.
c) Explain why a cross between red flowered plants and white flowered plants produced pink flowers.
d) If the total number of F2 generation offsprings was 7324. Calculate the number of red flowered plants.
Date posted:
September 17, 2019
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Answers (1)
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Red blood cells from a rabbit were placed in a petri dish containing a certain solution. A drop from the petri dish was then mounted...
(Solved)
Red blood cells from a rabbit were placed in a petri dish containing a certain solution. A drop from the petri dish was then mounted on a slide and observed under a light microscope after 20 minutes.He made the drawings below.
a) Name solution Y
b) What term is to is describe the process that took place.
Date posted:
September 17, 2019
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Answers (1)
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What is the process that leads to addition or loss of one or more chromosomes?
(Solved)
What is the process that leads to addition or loss of one or more chromosomes?
Date posted:
September 17, 2019
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Answers (1)
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During a field study, a student at Muringa secondary school collected a certain organisms whose actual length was four centimeters. He made a drawing of...
(Solved)
During a field study, a student at Muringa secondary school collected a certain organisms whose actual length was four centimeters. He made a drawing of the organism whose length was 12cm. Calculate the magnification of the drawing.
Date posted:
September 17, 2019
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Answers (1)
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Identify the type of immunity given When a young child suffers from measles and recovers from it.
(Solved)
Identify the type of immunity given When a young child suffers from measles and recovers from it.
Date posted:
September 17, 2019
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Answers (1)
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Identify the type of immunity given When a baby obtains antibodies through breastfeeding.
(Solved)
Identify the type of immunity given When a baby obtains antibodies through breastfeeding.
Date posted:
September 17, 2019
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Answers (1)
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State the difference between a cell wall and a cell membrane.
(Solved)
State the difference between a cell wall and a cell membrane.
Date posted:
September 17, 2019
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Answers (1)
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Study the diagram below and answer the questions that follow.
(Solved)
Study the diagram below and answer the questions that follow.
a) Identify the apparatus.
b) State the functions of the part labeled x.
Date posted:
September 17, 2019
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Answers (1)
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The diagram below represents a certain stage in cell division.
(Solved)
The diagram below represents a certain stage in cell division.
a) i) Identify the type of cell division.
ii) Give reasons for your answer in a(i) above.
b) State the stage of cell division shown in the diagram above.
Date posted:
September 17, 2019
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Answers (1)
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Name the plant hormone that is involved in topic responses.
(Solved)
Name the plant hormone that is involved in topic responses.
Date posted:
September 17, 2019
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Answers (1)
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Which field of biology deals with the Study of interrelationship of living things in their surroundings.
(Solved)
Which field of biology deals with the Study of interrelationship of living things in their surroundings.
Date posted:
September 17, 2019
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Answers (1)
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Part of one strand of a DNA molecule was found to have the following sequence. Show the complementary strand G-C-C-A-G-A-T-C-A-C
(Solved)
Part of one strand of a DNA molecule was found to have the following sequence. Show the complementary strand G-C-C-A-G-A-T-C-A-C
Date posted:
September 17, 2019
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Answers (1)
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The following figure represents the forelimbs of certain animal species. Study them and answer the questions that follow.
(Solved)
The following figure represents the forelimbs of certain animal species. Study them and answer the questions that follow.
a) Name the parts labeled E, F and G.
b) Name the type of joint at point K
c) Which features represent
i) Analogous structures
ii) Homologous structures
iii) Give a reason for (ii) above
d) i) What are vestigial organs?
ii) Give two examples of vestigial organs in Humans
e) State the type of skeleton found;
i) In figure I
ii) On the part labeled S on figure 3
Date posted:
September 17, 2019
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Answers (1)