(a)
A- Cornified layer
B- Sebaceous gland
(b) (i) Hair raised trapping air between hair and the body air is a bad conductor of heat insulates the body against heat loss:
(ii)
Vasoconstriction- less flows to the skin less head lost
-Metabolic rate increase heat production;
-Shivering un involuntary contraction skeletal muscles to generate heat;
marto answered the question on October 9, 2019 at 07:56
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The following is a diagrammatic representation of a dissection of a rabbit showing the urinogenital system.
(Solved)
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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Answers (1)
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Study the diagram below and answer the questions which follow.
(Solved)
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
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Answers (1)
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The diagram below represents a bone obtained form a mammal.
(Solved)
The diagram below represents a bone obtained form a mammal.
(a) Identify the bone
(b) Name the structures labeled X and W
(c) Name the bone that articulate with structure labeled Z
Date posted:
October 8, 2019
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Answers (1)
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The diagram below represents a bone obtained from a mammalian skeleton.
(Solved)
The diagram below represents a bone obtained from a mammalian skeleton.
(a) Identify the bone
(b) Name the:
(i) Bone it articulates with at point A
(ii) Type of joint that forms at point B in articulation with other bones
Date posted:
October 8, 2019
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Answers (1)
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Give three importance of mammalian skeleton.
(Solved)
Give three importance of mammalian skeleton.
Date posted:
October 8, 2019
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Answers (1)
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State three types of skeleton found in Kingdom animalia.
(Solved)
State three types of skeleton found in Kingdom animalia.
Date posted:
October 8, 2019
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Answers (1)
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The diagram below represents a mammalian bone.
(Solved)
The diagram below represents a mammalian bone.
(a) Identify the bone shown above.
(b) State the function of the parts labelled R and S.
(c) State the region of the body in which the bone is found.
Date posted:
October 8, 2019
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Answers (1)
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The diagram below represents a bone in the mammalian skeleton.
(Solved)
The diagram below represents a bone in the mammalian skeleton.
a) Identify the bone with a reason.
b) State the function of the part labeled D.
Date posted:
October 8, 2019
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Answers (1)
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The diagram below represents a simple reflex arc.
(Solved)
The diagram below represents a simple reflex arc.
(a) Name the parts labeled A and B
(b) Explain how an impulse is transmitted across the gap labeled C
Date posted:
October 7, 2019
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Answers (1)
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An experiment was carried out to investigate a growth response in maize seedling as shown in the diagram below.
(Solved)
An experiment was carried out to investigate a growth response in maize seedling as shown in the diagram below.
(a) State the type of response that is being investigated.
(b) Explain the response exhibited by the shoot.
Date posted:
October 7, 2019
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Answers (1)
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(a) State two differences between taxes and tropisms.
(b) Give two survival values of tactic movements to organisms.
(Solved)
(a) State two differences between taxes and tropisms.
(b) Give two survival values of tactic movements to organisms.
Date posted:
October 7, 2019
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Answers (1)
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Study the drawing below and use it to answer the questions that follow.
(Solved)
Study the drawing below and use it to answer the questions that follow.
a) Name the part labeled X.
b) Describe the changes that occur in the structure X in dim light.
c) What is meant by the term accommodation with reference to the eye?
Date posted:
October 7, 2019
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Answers (1)
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Name the region of the gut where digestion of cellulose takes place.
(Solved)
Name the region of the gut where digestion of cellulose takes place.
Date posted:
October 7, 2019
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Answers (1)
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The figure below represents the distribution of height of pupils in a school.
(Solved)
The figure below represents the distribution of height of pupils in a school.
(a) Name the type of variation represented by the curve
(b) Outline two possible causes of variation in height of individuals in man
Date posted:
October 7, 2019
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Answers (1)
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Distinguish between complete and incomplete dominance.
(Solved)
Distinguish between complete and incomplete dominance.
Date posted:
October 7, 2019
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Answers (1)
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In an experiment the radicle of a seedling was marked equidistant using Indian ink as shown in the diagram below.
(Solved)
In an experiment the radicle of a seedling was marked equidistant using Indian ink as shown in the diagram below.
(a) What was the aim of the experiment?
(b) On the diagram below mark on the radicle to show the appearance of the marks after 3days
(c ) State three characteristics of cells found just behind the root cap of a radicle
(d) Give two factors inside a seed that causes seed dormancy
Date posted:
October 7, 2019
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Answers (1)
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Carefully study the figure below and answer the questions that follow:-
(Solved)
Carefully study the figure below and answer the questions that follow:-
The seedling with straight radicle and plumule was attached to a machine horizontally as shown above. The machine rotates making one revolution in 15 minutes.
(a) Draw how the seedling would look like after one week
(b) Explain your drawing in (a) above
(c) Name the machine used in the experiment above
(d) What would happen if the seedling was put horizontally outside the machine
(e) Name the stimuli investigated and type(s) of response expected in the experiment
Date posted:
October 7, 2019
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Answers (1)
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The relationship between seed fresh mass in the lupin lupinus and percentage seed germination, percentage seedling survival and seedling fresh mass is shown in the...
(Solved)
The relationship between seed fresh mass in the lupin lupinus and percentage seed germination, percentage seedling survival and seedling fresh mass is shown in the table.
a) How was percentage germination in column two of the table calculated?
b) Why was seed fresh mass preferred to seed dry mass to take measurements of the seed weight in the experiment
c)
i) Explain why the measurements of mean seedling fresh mass (5) weeks after germinated may not have been an accurate measurement of growth that had occurred.
ii) How could more meaningful and accurate measurement been obtained in c(i) above?
d) With reference to the figures in the taste indicate the relationship between seed fresh mass and percentage seed germination, percentage seedling survival and seedling fresh mass.
e) Suggest an explanation why seedling produced from large seeds grow more rapidly than the
seedling produced from small seeds
Date posted:
October 7, 2019
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Answers (1)
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The diagram below represents a set-up that was used to investigate the effect of rotation on the growth of a bean radicle. The set-up allowed...
(Solved)
The diagram below represents a set-up that was used to investigate the effect of rotation on the growth of a bean radicle. The set-up allowed the seedling to rotate slowly and continuously for seven days.
(a) Name the piece of apparatus illustrated.
(b)
(i) State the observation made on the shape of the radicle after seven days
(ii) Explain the observation in (b) (i) above
(c) Suggest a suitable control for this experiment.
(d) Give any four importance of tropism in plants.
Date posted:
October 7, 2019
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Answers (1)
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The following data represents the development in dry mass of germinating seedlings within 18 weeks:
(Solved)
The following data represents the development in dry mass of germinating seedlings within 18 weeks:
(a) Write reference to the graph, explain the changes in dry mass between:-
(i) Week 0 to 2
(ii) Week 5 to 13
(iii) Week 16 - 18
(b)
(i) What is the significance of time zero?
(ii) What difference would be expected from the above results if the experiment started with the seeds? Give a reason for your answer
(c)
(i) Describe how you carry out the experiment to obtain dry mass in the respective weeks
(ii) State one advantage of using dry mass instead of fresh weight in estimating growth of an organism
Date posted:
October 7, 2019
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Answers (1)