i) Positive phototropism allows plant shoots to obtain optimum light for photosynthesis 1 mark
ii) Light causes lateral migration of auxins to the darker side; the darker side has a higher auxin concentration than the light
side, cells on the darker side grow and elongate faster causing the curvature towards light;
sharon kalunda answered the question on May 29, 2019 at 09:20
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What problems are experienced by fresh water and marine fish in their habitats.
(Solved)
What problems are experienced by fresh water and marine fish in their habitats.
Date posted:
May 29, 2019
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Answers (1)
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Work out a cross between a haemophilic man married to a carrier woman for haemophilia.
(Solved)
Work out a cross between a haemophilic man married to a carrier woman for haemophilia.
Date posted:
May 29, 2019
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Answers (1)
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Explain why certain bacteria and other pathogens become resistant to drugs after sometime.
(Solved)
Explain why certain bacteria and other pathogens become resistant to drugs after sometime.
Date posted:
May 29, 2019
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Name the disease caused by the schistosoma.
(Solved)
Name the disease caused by the schistosoma.
Date posted:
May 29, 2019
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State four adaptive features that make schistosoma a successful endoparasite.
(Solved)
State four adaptive features that make schistosoma a successful endoparasite.
Date posted:
May 29, 2019
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State two functions of muscles found in the reproductive system in females.
(Solved)
State two functions of muscles found in the reproductive system in females.
Date posted:
May 29, 2019
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Answers (1)
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Below is a simplified diagram of a flower.
i) Suggest its agent of pollination.
ii) Name the type of ovary shown above.
iii) Explain one observable...
(Solved)
Below is a simplified diagram of a flower.
i) Suggest its agent of pollination.
ii) Name the type of ovary shown above.
iii) Explain one observable mechanism that will hinder self pollination and fertilization in the above flower.
Date posted:
May 29, 2019
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Answers (1)
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Explain why the rate of transpiration is reduced when humidity is high.
(Solved)
Explain why the rate of transpiration is reduced when humidity is high.
Date posted:
May 29, 2019
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Name the three processes that takes place in the liver to bring about difference in composition of blood in hepatic portal vein and hepatic vein.
(Solved)
Name the three processes that takes place in the liver to bring about difference in composition of blood in hepatic portal vein and hepatic vein.
Date posted:
May 29, 2019
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Answers (1)
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Why is the mule sterile?
(Solved)
Why is the mule sterile?
Date posted:
May 29, 2019
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Answers (1)
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How is the dark stage of photosynthesis dependent to light stage.
(Solved)
How is the dark stage of photosynthesis dependent to light stage.
Date posted:
May 29, 2019
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Answers (1)
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Two glucose molecules combine to form the disaccharide sucrose. The moleculer formula of glucose is C6H12O6 while a single sucrose molecule has the molecular formula...
(Solved)
Two glucose molecules combine to form the disaccharide sucrose. The moleculer formula of glucose is C6H12O6 while a single sucrose molecule has the molecular formula C12H22O11. Account for the observation.
Date posted:
May 29, 2019
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Answers (1)
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If a solution of 0.9% salt solution is isotonic to a certain type of animal cell, explain what happens when the animal cell is placed...
(Solved)
If a solution of 0.9% salt solution is isotonic to a certain type of animal cell, explain what happens when the animal cell is placed in a solution of 1.2% salt solution.
Date posted:
May 29, 2019
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Answers (1)
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What is the importance of a pooter to an ecologist?
(Solved)
What is the importance of a pooter to an ecologist?
Date posted:
May 29, 2019
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Name the components of the enamel of teeth.
(Solved)
Name the components of the enamel of teeth.
Date posted:
May 29, 2019
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Answers (1)
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The diameter of the field of view of a microscope was found to be 6mm. There were 8 cells across the diameter of the field...
(Solved)
The diameter of the field of view of a microscope was found to be 6mm. There were 8 cells across the diameter of the field of
view.Calculate the size of one cell in micrometer.
Date posted:
May 29, 2019
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Answers (1)
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Explain why it is genetically unwise for sisters to marry brothers or father to marry their daughters.
(Solved)
Explain why it is genetically unwise for sisters to marry brothers or father to marry their daughters.
Date posted:
May 29, 2019
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Answers (1)
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The apparatus shown below was set up by form two students in a certain school.
a) Name the gas X.
b) Write a word equation for...
(Solved)
The apparatus shown below was set up by form two students in a certain school.
a) Name the gas X.
b) Write a word equation for the reaction which produces the gas.
c) Where in the human body does this type of reaction occur.
Date posted:
May 29, 2019
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Answers (1)
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When the tip of a plant is cut, lateral branches develop.
a) What name is given to this phenomenon?
b) Which plant hormone is responsible for the...
(Solved)
When the tip of a plant is cut, lateral branches develop.
a) What name is given to this phenomenon?
b) Which plant hormone is responsible for the phenomenon above.
Date posted:
May 29, 2019
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Answers (1)
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A certain organ K was surgically removed from a rat. It was later found that there was a drastic increase in glucose level in the
blood....
(Solved)
A certain organ K was surgically removed from a rat. It was later found that there was a drastic increase in glucose level in the
blood. When substance Q was injected into the animal the glucose in the blood went back to normal. Identify
i) Organ K
ii) Substance Q.
Date posted:
May 29, 2019
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Answers (1)