(a) The solution is hypertonic to the potato tissue cells; the cells thus lost water by osmosis, shrink and became flaccid leading to decrease in length of the tissue.
(b) 900kPa; there is no net change in the length at this concentration
maurice.mutuku answered the question on August 13, 2019 at 13:50
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Explain why acquired characteristics are not heritable.
(Solved)
Explain why acquired characteristics are not heritable.
Date posted:
August 13, 2019
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Answers (1)
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State the biological significance of each of the following in the digestive system.
(Solved)
State the biological significance of each of the following in the digestive system.
(i) Emulsification of lipids.
(ii) Thin epithelium of the ileum.
Date posted:
August 13, 2019
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Answers (1)
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The diagram below shows part of the mammalian female reproductive system.
(Solved)
The diagram below shows part of the mammalian female reproductive system.
(a) Name the part labelled B.
(b) State the function of part labelled B.
(c) State adaptations of the part labeled A.
Date posted:
August 13, 2019
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Answers (1)
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Explain why specimens must be mounted in a vacuum in electron microscope.
(Solved)
Explain why specimens must be mounted in a vacuum in electron microscope.
Date posted:
August 13, 2019
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Answers (1)
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Give reasons why an electron microscope cannot be used to view live specimens.
(Solved)
Give reasons why an electron microscope cannot be used to view live specimens.
Date posted:
August 13, 2019
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Answers (1)
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The diagram below shows a gaseous exchange structure in the stems of angiosperms.
(Solved)
The diagram below shows a gaseous exchange structure in the stems of angiosperms.
Name;
(a) Part labelled A.
(b) The apparatus labelled X.
(c) Substances represented by arrows B and C.
Date posted:
August 13, 2019
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Answers (1)
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Explain why glucose and proteins are absent in the urine of a healthy person.
(Solved)
Explain why glucose and proteins are absent in the urine of a healthy person.
Date posted:
August 13, 2019
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Answers (1)
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Complete the table below.
(Solved)
Complete the table below.
Date posted:
August 13, 2019
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Answers (1)
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In actively photosynthesizing cells the sugars formed are quickly converted to starch. What is the
biological advantage of this?
(Solved)
In actively photosynthesizing cells the sugars formed are quickly converted to starch. What is the
biological advantage of this?
Date posted:
August 13, 2019
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Answers (1)
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State the role of the following during photosynthesis:(i) Carbon (IV) oxide.(ii) Light energy from the sun.
(Solved)
State the role of the following during photosynthesis:
- Carbon (IV) oxide.
Date posted:
August 13, 2019
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Answers (1)
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What is the function of Eyebrows?
(Solved)
What is the function of Eyebrows?
Date posted:
August 13, 2019
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Answers (1)
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A person fell from the third floor of a building and had part of his brain damaged. Name the part of the brain damaged if...
(Solved)
A person fell from the third floor of a building and had part of his brain damaged. Name the part of the brain damaged if the person suffers from the following.
(i) Loss of speech
(ii) Inability to regulate body temperature.
(iii) Lack of body balance.
Date posted:
August 13, 2019
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Answers (1)
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Name the branch of biology that:
(a) Deals with phylogenetic relationship between organisms.
(b) Deals with disputed parentage.
(c) Would be useful to a beekeeper.
(Solved)
Name the branch of biology that:
(a) Deals with phylogenetic relationship between organisms.
(b) Deals with disputed parentage.
(c) Would be useful to a beekeeper.
Date posted:
August 13, 2019
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Answers (1)
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The diagrams below shows leaves obtained from plant A and C grown in the same habitat.
(Solved)
The diagrams below shows leaves obtained from plant A and C grown in the same habitat.
Identify the leaf that will lose the least amount of water. Justify your answer.
Date posted:
August 13, 2019
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Answers (1)
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For a long time, chloroquine was the most effective in the treatment of malaria. Explain why it is becoming more difficult to treat malaria using...
(Solved)
For a long time, chloroquine was the most effective in the treatment of malaria. Explain why it is
becoming more difficult to treat malaria using chloroquine
Date posted:
August 13, 2019
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Answers (1)
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Study the process below and answer the questions that follow.
(Solved)
Study the process below and answer the questions that follow.
(a) Name process P.
(b) Name the part of a cell in which the process named in (a) above occurs.
Date posted:
August 13, 2019
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Answers (1)
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Mutations form basis for variations. Name the type of mutation that cause the following human disorders.
(Solved)
Mutations form basis for variations. Name the type of mutation that cause the following human disorders.
(a) Albinism.
(b) Down’s syndrome.
Date posted:
August 13, 2019
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Answers (1)
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The figure below illustrates specialized cells.
(Solved)
The figure below illustrates specialized cells.
(a) Identify the cells.
(b) Name the organ where the cells name in (a) above are found.
(c) State the functions of the cells.
Date posted:
August 13, 2019
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Answers (1)
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In mice the allele for black fur is dominant to the allele for brown fur.
What percentage offspring would have brown fur from a cross between...
(Solved)
In mice the allele for black fur is dominant to the allele for brown fur.
What percentage offspring would have brown fur from a cross between heterozygous black mice and brown mice. Show your working. Use letter B to represent the allele for black colour
Date posted:
August 5, 2019
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Answers (1)
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The figure below show a portion of nucleic acid
(Solved)
The figure below show a portion of nucleic acid
C – U – G – C
i). Name the nucleic acid
ii).Give a reason
Date posted:
August 5, 2019
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Answers (1)