(i) Photolysis
(ii) Grana of chloroplast
(iii) Sunlight; chlorophyll
maurice.mutuku answered the question on August 22, 2019 at 06:05
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Giving a reason, state the organisms that are MOST closely related.
(Solved)
Giving a reason, state the organisms that are MOST closely related.
Date posted:
August 22, 2019
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Answers (1)
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The diagram below shows results of what happens to plant cell when placed in a certain solution.
(Solved)
The diagram below shows results of what happens to plant cell when placed in a certain solution.
(i) What was the nature of the solution in which the cell was placed?
(ii) Identify the force represented by the arrow X and explain how it develops.
Date posted:
August 22, 2019
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Answers (1)
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The photomicrograph below shows some structures of a cell. Study it and answer the questions that follow.
(Solved)
The photomicrograph below shows some structures of a cell. Study it and answer the questions that follow.
(a) Identify the organelles represented by:
S:
T:
(b) State the function of S
(c) Name an animal cell from which the photomicrograph above was obtained. Explain your answer.
(d) Work out the actual length of the structure T in micrometers.
Date posted:
August 14, 2019
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Answers (1)
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The diagram below shows how a seed changes after it is planted in a well-watered soil.
(Solved)
The diagram below shows how a seed changes after it is planted in a well-watered soil.
(a) Explain how the part labelled A straightens as shown in the last diagram.
(b) Other than storage of food for germination, state two functions of part B.
Date posted:
August 14, 2019
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Answers (1)
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A red cow was mated with a white bull. All F1 offspring were neither red nor white.Such individuals are said to be roan.
(Solved)
A red cow was mated with a white bull. All F1 offspring were neither red nor white.Such individuals are said to be roan.
(a) Using letter R to represent the gene for red colour and W for the gene for white colour. Work out the genotypes of the F1 offspring.
(b) If the F1 offspring were selfed, state the phenotypic and genotypic ratios of the F2 offspring.
(c) State two importance of using plants in genetics experiments.
Date posted:
August 14, 2019
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Answers (1)
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A number of industries in Nairobi and Machakos counties have recently been found to direct their effluents into Nairobi River and Athi River respectively. State...
(Solved)
A number of industries in Nairobi and Machakos counties have recently been found to direct their effluents into Nairobi River and Athi River respectively. State two effects of each of the following substances present in the industrial effluents.
(a) Lead.
(b) Oils.
Date posted:
August 13, 2019
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Answers (1)
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The diagram below shows a mammalian bone. Use it to answer questions that follow.
(Solved)
The diagram below shows a mammalian bone. Use it to answer questions that follow.
(a) With a reason, identify the bone.
Identity:
Reason:
(b) Identify each of the parts labelled:
A:
B:
(c) State the function of the part labelled C.
Date posted:
August 13, 2019
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Answers (1)
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Below is a diagram of organism of a particular kingdom.
(Solved)
Below is a diagram of organism of a particular kingdom.
(a) Identify the kingdom to which it belongs.
(b) Name the parts labelled:
A:
B:
(c) Other than absorption of food state one main role of structure labelled C.
Date posted:
August 13, 2019
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Answers (1)
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In an experiment, some germinating seeds were placed in a large air tight flask and left for 3 days.
(Solved)
In an experiment, some germinating seeds were placed in a large air tight flask and left for 3 days. What are the expected changes in composition of air inside the flask?
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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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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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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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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Draw and label the structure of a gill.
(Solved)
Draw and label the structure of a gill.
Date posted:
August 5, 2019
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Answers (1)
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Give four modes of expressing food relationship in an ecosystem.
(Solved)
Give four modes of expressing food relationship in an ecosystem.
Date posted:
August 5, 2019
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Answers (1)
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In a certain plant species, which is normally green, a recessive gene for colour (n) causes the plant to be white when present in the...
(Solved)
In a certain plant species, which is normally green, a recessive gene for colour (n) causes the plant to be white when present in the homozygous stat. Such plants die young at an early age. In the heterozygous state the plants are pale green and grow to maturity.
(a).Suggest a reason for the early death of the plants with the homozygous recessive genes.
(b).If a normal green plant was crossed with the pale green plant, what will be the phenotypic ratio of F1 generation?
(c).Give an explanation for the occurrence of pale green colour in the heterozygous state.
Date posted:
August 5, 2019
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Answers (1)
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Differentiate between the mode of fertilization in higher plants and in mammals.
(Solved)
Differentiate between the mode of fertilization in higher plants and in mammals.
Date posted:
August 5, 2019
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Answers (1)
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The eggs of birds are relatively much larger than those of mammals. Explain
(Solved)
The eggs of birds are relatively much larger than those of mammals. Explain
Date posted:
June 18, 2019
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Answers (1)