a) R - cervix
S - chorion
b)- Highly vascularized;
- Has villi which offer a large surface area;
- Has secretory cells / grandular cells for secreting hormones;
c) i) Amniotic fluid;
ii) Cushions foetus against shock / provides suitable medium for embryo to grow / allows movement of foetus / reduces friction / lubricate ;
sharon kalunda answered the question on May 23, 2019 at 13:14
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The diagram below represents a food web in a certain ecosystem.
a) i) Name the group of organisms that would have the largest biomass
ii) Give...
(Solved)
The diagram below represents a food web in a certain ecosystem.
a) i) Name the group of organisms that would have the largest biomass
ii) Give a reason for your answer in a(i) above.
b) Construct food chain ending with
i) Tertiary consumer
ii) Quaternary consumer
c) State two short term effects on the ecosystem if there were prolonged droughts.
Date posted:
May 23, 2019
.
Answers (1)
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The diagram below shows how blood glucose in mammalian body is regulated.
a) Explain what happens during corrective mechanism P.
b) Name two organs involved in...
(Solved)
The diagram below shows how blood glucose in mammalian body is regulated.
a) Explain what happens during corrective mechanism P.
b) Name two organs involved in corrective mechanisms P and Q.
c) State two reasons why glucose level should be maintained constant.
d) What is osmoregulation?
Date posted:
May 23, 2019
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Answers (1)
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A woman with normal skin pigmentation was married to a man with normal skin pigmentation. They had two children, one
with normal skin colour, genotype AA,...
(Solved)
A woman with normal skin pigmentation was married to a man with normal skin pigmentation. They had two children, one
with normal skin colour, genotype AA, while the other one was an albino.
a) State the couple's genotypes.
b) Using a genetic cross, show how they were able to produce an albino and a normal skinned child.
c) What is the percentage of their third child being an albino?.
d) State one way one could easily identify an albino.
Date posted:
May 23, 2019
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Answers (1)
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State the function of a tendon in mammalian skeleton.
(Solved)
State the function of a tendon in mammalian skeleton.
Date posted:
May 23, 2019
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Answers (1)
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Give two adaptive features the make a predator efficient in capturing prey.
(Solved)
Give two adaptive features the make a predator efficient in capturing prey.
Date posted:
May 23, 2019
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Answers (1)
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Give two reasons why potato tubers become sweeter after boiling.
(Solved)
Give two reasons why potato tubers become sweeter after boiling.
Date posted:
May 23, 2019
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Answers (1)
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Explain what happens when diaphragm muscles contract during breathing in mammals.
(Solved)
Explain what happens when diaphragm muscles contract during breathing in mammals.
Date posted:
May 23, 2019
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Answers (1)
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How does drug abuse expose one to the dangers of HIV/AIDS?.
(Solved)
How does drug abuse expose one to the dangers of HIV/AIDS?.
Date posted:
May 23, 2019
.
Answers (1)
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In an experiment to observe some variations in lengths of leaves of Jacaranda, the following curve was obtained.
i) Identify the type of variation illustrated by...
(Solved)
In an experiment to observe some variations in lengths of leaves of Jacaranda, the following curve was obtained.
i) Identify the type of variation illustrated by the curve.
ii) Explain the cause of the variation you have named in (i) above.
Date posted:
May 23, 2019
.
Answers (1)
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In an experiment, two equal volumes of solutions L and M were placed into visking tubings. The two viskig tubings were
suspended as shown below.
(Solved)
In an experiment, two equal volumes of solutions L and M were placed into visking tubings. The two viskig tubings were
suspended as shown below.
Explain the results that were obtained in the visking tubings at the end of the experiment.
Date posted:
May 23, 2019
.
Answers (1)
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Study the diagram below and answer the questions that follow.
a) Identify the diagram above.
b) State one reason for your answer in (a) above.
c)...
(Solved)
Study the diagram below and answer the questions that follow.
a) Identify the diagram above.
b) State one reason for your answer in (a) above.
c) Name the parts labelled A and B.
Date posted:
May 23, 2019
.
Answers (1)
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The set-up below shows an experiment to investigate photosynthesis.
a) What gas was collected in the test-tube.
b) What two environmental conditions are necessary for the...
(Solved)
The set-up below shows an experiment to investigate photosynthesis.
a) What gas was collected in the test-tube.
b) What two environmental conditions are necessary for the experiment?
c) What was the role of sodium hydrogen carbonate in the experiment.
Date posted:
May 23, 2019
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Answers (1)
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Explain why protein is absent in urine of a normal person.
(Solved)
Explain why protein is absent in urine of a normal person.
Date posted:
May 23, 2019
.
Answers (1)
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Why is pyramid of biomass a better method of representing ecological relationships in habitats?
(Solved)
Why is pyramid of biomass a better method of representing ecological relationships in habitats?
Date posted:
May 23, 2019
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Answers (1)
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Name a respiratory substrate usually available for energy release during starvation.
(Solved)
Name a respiratory substrate usually available for energy release during starvation.
Date posted:
May 23, 2019
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Answers (1)
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Explain why a cross-circuit athlete pants heavily after sprint race.
(Solved)
Explain why a cross-circuit athlete pants heavily after sprint race.
Date posted:
May 23, 2019
.
Answers (1)
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A potato cylinder measuring 100 mm was placed in a concentrated salt solution for 30 minutes. Describe its texture and
appearance after 30 minutes.
(Solved)
A potato cylinder measuring 100 mm was placed in a concentrated salt solution for 30 minutes. Describe its texture and
appearance after 30 minutes.
Date posted:
May 23, 2019
.
Answers (1)
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State two disadvantages of fossil records as an evidence of evolution.
(Solved)
State two disadvantages of fossil records as an evidence of evolution.
Date posted:
May 23, 2019
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Answers (1)
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State the importance of the following processes to living organisms.
a) Locomotion.
b) Irritability
(Solved)
State the importance of the following processes to living organisms.
a) Locomotion.
b) Irritability
Date posted:
May 23, 2019
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Answers (1)
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Explain why herbivores have large eyes on their sides?
(Solved)
Explain why herbivores have large eyes on their sides?
Date posted:
May 22, 2019
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Answers (1)