(a)
Set 1 – normal conditions
Set E1 – in the dark
Set B – unidirectional light
(b) (i) Etiolation;
(ii) To reach light for photosynthesis;
(c) (i) Positive phototropism;
(ii) Auxins migrate to the darker side causing faster growth/elongation on this side; resulting in curvature of the shoot towards the source of light;
(d) (i) Set A1 – Epigeal;
Set M1 – hypogeal;
(ii) Set A1 – cotyledons brought above the ground;
Set M1 – cotyledons remain below the earth?s surface/
underground;
sharon kalunda answered the question on September 16, 2019 at 13:20
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Study the kidney diagrams below:
(Solved)
Study the kidney diagrams below:
a) i) Name the part labeled A in figure 1
ii) Name the process that takes place in the parts labeled V.
b) State two homeostatic functions of the organ in the diagram above.
c) Explain what will happen to the process of urine formation in absence of ADH.
Date posted:
September 16, 2019
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Answers (1)
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The diagram below represents three types of neurons found in a mammalian body.
(Solved)
The diagram below represents three types of neurons found in a mammalian body.
(a) Name the neurons X, Y and Z
(b) Name the chemical substance responsible for the transmission of an impulse across the gap labelled W.
(c) State two functions of the part labelled M.
(d) In which part of the spinal cord is neurone Y located?
(e) Using arrows indicate on the diagrams the direction followed by nerve impulse leading to a response.
Date posted:
September 16, 2019
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Answers (1)
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Below is a diagram of a plant a form three student collected while carrying out an ecological study
(Solved)
Below is a diagram of a plant a form three student collected while carrying out an ecological study
a) With reasons identify the division into which the students classified the plant.
b) (i) Name the structure that produces spores in this plant.
(ii) State two differences between the plant division above and that of the division spermatophyta.
c) Give two distinguishing features of class Amphibia
Date posted:
September 16, 2019
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Answers (1)
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Below is a diagram of a structure found in Eukaryotic cells. Study it and answer the questions that follow
(Solved)
Below is a diagram of a structure found in Eukaryotic cells. Study it and answer the questions that follow
a) Identify the structure
b) State two functions of the structure
c) i) Name one organelle found in animal cells but absent in plant cells
ii) State one function of the organelle you have named in(c) i) above
Date posted:
September 16, 2019
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Answers (1)
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Some form three students took a germinating maize grain and placed it in a starch paste in a petri dish and put the Petri dish...
(Solved)
Some form three students took a germinating maize grain and placed it in a starch paste in a petri dish and put the Petri dish in a water bath maintained at 30oC. After 48 hours the starch paste was irrigated with iodine solution .The area around the maize grain changed to the colour of iodine solution while the rest turned blue –black.
(a) Account for the observation
(b) Why was the Petri dish put in a water bath maintained at 30oC?
Date posted:
September 16, 2019
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Answers (1)
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The diagram below represents a simple endocrine feedback mechanism in a human male.
(Solved)
The diagram below represents a simple endocrine feedback mechanism in a human male.
(a) Name the hormone labeled X
(b) State two differences that may be observed between a normal male and one who is incapable of producing hormone labeled Y
Date posted:
September 16, 2019
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Answers (1)
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What are the functions of the odontoid process found on the axis bone of the cervical vertebra?
(Solved)
What are the functions of the odontoid process found on the axis bone of the cervical vertebra?
Date posted:
September 16, 2019
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Answers (1)
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Active yeast cells were added to a dilute sugar solution in a container. The mixture was kept in a warm room. After a few hours...
(Solved)
Active yeast cells were added to a dilute sugar solution in a container. The mixture was kept in a warm room. After a few hours bubbles of gas were observed escaping from the mixture.
(a) Write an equation to represent the chemical reaction above.
(b) What is the economic importance of this type of chemical reaction in industry?
Date posted:
September 16, 2019
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Answers (1)
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In which part of the spinal cord is the cell body of the motor neurone found?.
(Solved)
In which part of the spinal cord is the cell body of the motor neurone found?.
Date posted:
September 16, 2019
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Answers (1)
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State the role of the swim bladder in a fish.
(Solved)
State the role of the swim bladder in a fish.
Date posted:
September 16, 2019
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Answers (1)
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Name the division of the Kingdom plantae with the following spore producing bodies.
(i) Sori
(ii) Capsule
(Solved)
Name the division of the Kingdom plantae with the following spore producing bodies.
(i) Sori
(ii) Capsule
Date posted:
September 16, 2019
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Answers (1)
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A small amount of chemical M was put on one side of maize celeoptiles. After some days, it was noted that the celeoptiles curved away...
(Solved)
A small amount of chemical M was put on one side of maize celeoptiles. After some days, it was noted that the celeoptiles curved away from the side to which the chemical was applied.
(a) Suggest the possible identity of chemical substance M
(b) Explain how this chemical might have caused the celeoptiles to curve.
Date posted:
September 16, 2019
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Answers (1)
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In a blood test, a few drops of anti-B serum were added to two samples of blood. It was noted that agglutination occurred.What were the...
(Solved)
In a blood test, a few drops of anti-B serum were added to two samples of blood. It was noted that agglutination occurred.What were the possible blood groups of the two blood samples?
Date posted:
September 16, 2019
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Answers (1)
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Industrial wastes may contain metabolic pollutants. State how such pollutants may indirectly reach and accumulate in the human body if the wastes were dumped into...
(Solved)
Industrial wastes may contain metabolic pollutants. State how such pollutants may indirectly reach and accumulate in the human body if the wastes were dumped into rivers.
Date posted:
September 16, 2019
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Answers (1)
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The apparatus whose diagram is given below can be used to demonstrate results of a physiological process that occurs in a mammal. To use the...
(Solved)
The apparatus whose diagram is given below can be used to demonstrate results of a physiological process that occurs in a mammal. To use the apparatus, the experiment places his mouth at the point marked X and breaths in and out gently.
a. State the observations in the boiling tube when the experimenter
i) Breaths in:
Boiling tube, A
Boiling tube, B
b) Breaths out:
Boiling tube, A
Boiling tube, B
c. What conclusions can you draw from the results of this experiment
d. What is the purpose of the boiling tube A?
Date posted:
September 16, 2019
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Answers (1)
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A patient whose blood group is A died shortly after receiving blood from a person of blood group B. Explain the possible cause of the...
(Solved)
A patient whose blood group is A died shortly after receiving blood from a person of blood group B. Explain the possible cause of the death of the patient.
Date posted:
September 16, 2019
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Answers (1)
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Construct a step in a dichotomous key using two animals one with two pairs of legs and the other with four pairs of legs.
(Solved)
Construct a step in a dichotomous key using two animals one with two pairs of legs and the other with four pairs of legs.
Date posted:
September 16, 2019
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Answers (1)
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The diagram below shows the difference in growth response to varying hormone concentration by root and shoot
(Solved)
The diagram below shows the difference in growth response to varying hormone concentration by root and shoot
What is the effect of increasing auxin concentration on:
i) Roots
ii) Shoot
Date posted:
September 16, 2019
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Answers (1)
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State two ways in which human body is naturally protected against harmful bacteria.
(Solved)
State two ways in which human body is naturally protected against harmful bacteria.
Date posted:
September 16, 2019
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Answers (1)
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Complete the table below on mineral nutrition in plants.
(Solved)
Complete the table below on mineral nutrition in plants.
Date posted:
September 16, 2019
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Answers (1)