Dense cy1oplasms
Lack cell vacuoles
Thin cell walls
Kavungya answered the question on June 17, 2019 at 10:53
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Name the type of responses exhibited by:-(i) Marine crabs burrowing into the sand to avoid dilution of their body fluids(ii) Chlamy domonas plant moving towards...
(Solved)
Name the type of responses exhibited by:-
(i) Marine crabs burrowing into the sand to avoid dilution of their body fluids
(ii) Chlamydomonas plant moving towards a region of high light intensity
Date posted:
June 17, 2019
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Answers (1)
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State the biological importance of ecdysis in arthropods.
(Solved)
State the biological importance of ecdysis in arthropods.
Date posted:
June 17, 2019
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Answers (1)
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The cells shown below were obtained from different parts of a young root tip:
Give the name of the zone from which each cell was obtained...
(Solved)
The cells shown below were obtained from different parts of a young root tip:
Give the name of the zone from which each cell was obtained A, B and C
Date posted:
June 17, 2019
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Answers (1)
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State the importance of moulting in insects.
(Solved)
State the importance of moulting in insects.
Date posted:
June 17, 2019
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Answers (1)
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i)Identify the nucleic acid whose base sequence is shown below:
G-A-C-U-A-G-A-C-G
ii) Give a reason for your answer in c (i) above
iii) If the nucleic acid was...
(Solved)
i)Identify the nucleic acid whose base sequence is shown below:
G-A-C-U-A-G-A-C-G
ii) Give a reason for your answer in c (i) above
iii) If the nucleic acid was involved in protein synthesis, how many amino acids would be
present in the protein synthesized? Give a reason
Date posted:
June 17, 2019
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Answers (1)
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In a certain bird species, red flight feathers is controlled by gene R while white flight feathers is
controlled by gene r. The heterozygous condition Rr...
(Solved)
In a certain bird species, red flight feathers is controlled by gene R while white flight feathers is
controlled by gene r. The heterozygous condition Rr results into pink flight feathers. The two
genes are also sex linked and transmitted on x-chromosome.
a) By use of fusion lines, find the genotypes of across between a male with pink flight
feathers and a female with white flight feathers
b) Which type of dominance is illustrated here?
Date posted:
June 17, 2019
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Answers (1)
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A section of a DNA strand contains the following sequence CGGATAC
(a) Write the; (i) Complementary DNA strand
(ii) MRNA strand
(b) Name the site for protein synthesis...
(Solved)
A section of a DNA strand contains the following sequence CGGATAC
(a) Write the; (i) Complementary DNA strand
(ii) MRNA strand
(b) Name the site for protein synthesis in a cell
Date posted:
June 17, 2019
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Answers (1)
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Name a genetic disorder due to gene mutation that affects the malpighian layer of the
skin in man.
(Solved)
Name a genetic disorder due to gene mutation that affects the malpighian layer of the
skin in man.
Date posted:
June 17, 2019
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Answers (1)
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Explain why growth of long hair on the pinnae of the ears in human occurs in males only
(Solved)
Explain why growth of long hair on the pinnae of the ears in human occurs in males only
Date posted:
June 17, 2019
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Answers (1)
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Wekesa and Wanjiku who are siblings are both normal as their parents but have a hemophilic
brother. Give the Genotype of their parents.
(Solved)
Wekesa and Wanjiku who are siblings are both normal as their parents but have a hemophilic
brother. Give the Genotype of their parents.
Date posted:
June 17, 2019
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Answers (1)
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A DNA stand has the following base sequence: GCCTAGATCAC What is the sequence of the :
(i) Complementary DNA strand?
(ii) M-RNA strand coped form this...
(Solved)
A DNA stand has the following base sequence: GCCTAGATCAC What is the sequence of the :
(i) Complementary DNA strand?
(ii) M-RNA strand coped form this DNA strand
Date posted:
June 17, 2019
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Answers (1)
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Identify the type of gene mutations represented by the following pairs of words:-
(i) Shirt instead of skirt
(ii) Hopping instead of shopping
(iii) Eat instead of tea
(Solved)
Identify the type of gene mutations represented by the following pairs of words:-
(i) Shirt instead of skirt
(ii) Hopping instead of shopping
(iii) Eat instead of tea
Date posted:
June 17, 2019
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Answers (1)
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State three mechanisms that prevent self pollination in a flower that has both male and female
Parts.
(Solved)
State three mechanisms that prevent self pollination in a flower that has both male and female
Parts.
Date posted:
June 17, 2019
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Answers (1)
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A woman with blood group A gave birth to twins both having blood group AB.
Determine the genotype of:
a) Father
b) Mother
(Solved)
A woman with blood group A gave birth to twins both having blood group AB.
Determine the genotype of:
a) Father
b) Mother
Date posted:
June 17, 2019
.
Answers (1)
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In an investigation, two persons A and B drunk the same amount of glucose solution. Their blood
sugar levels were determined immediately and thereafter at intervals...
(Solved)
In an investigation, two persons A and B drunk the same amount of glucose solution. Their blood
sugar levels were determined immediately and thereafter at intervals of one hour for the next six
hours.
The results were as shown in the following table
(a) Explain each of the following observations;-
(i) Blood sugar level increased in person A between 0 and 1 hour
(ii) The blood sugar level dropped in person A between 1 and 4 hours
(b) From the graph, what is the normal blood glucose sugar level for human beings
(c) Suggest a reason for the high sugar level in person B
(d) How can the high blood sugar level in person B controlled?
(e) What is the biological significance of maintaining a relatively constant sugar level in a human
being
(f) Account for the decrease in the blood glucose level of person B after 4 hours
Date posted:
June 17, 2019
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Answers (1)
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Study the diagram below and answer the questions that follow
(a) Name the structure represented by the diagram
(b) (i) Name the parts labelled D and M
(ii)...
(Solved)
Study the diagram below and answer the questions that follow
(a) Name the structure represented by the diagram
(b) (i) Name the parts labelled D and M
(ii) Name the hormones whose sites of action are Q and G (c) Name one substance that is present in part N but absent in part Z
(d) The contents of part V were boiled with Benedicts’ solution and an orange precipitate was
formed. Account for the results
Date posted:
June 17, 2019
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Answers (1)
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Explain the significance of the flow system in the nephron where the glomerular filtrate
flows in opposite direction to that of blood in the surrounding capillaries
(Solved)
Explain the significance of the flow system in the nephron where the glomerular filtrate
flows in opposite direction to that of blood in the surrounding capillaries
Date posted:
June 17, 2019
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Answers (1)
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Kosgei and Onyancha collided during a football match and each got bruised. Kosgei’s bruise stopped bleeding after ten minutes while Onyancha’s bruise continued bleeding and...
(Solved)
Kosgei and Onyancha collided during a football match and each got bruised. Kosgei’s bruise stopped bleeding after ten minutes while Onyancha’s bruise continued bleeding and he had
to be taken to hospital for treatment.
(a) Explain the process which brought about stoppage of Kosgei’s bleeding
(b) Distinguish between blood clotting and haemagglutination.
(c) Name the disease, that Onyancha could be suffering from.
Date posted:
June 17, 2019
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Answers (1)
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The equation below represents a metabolic process that occurs in a certain organ in the m
mammalian body:-
Ammonia (enzymes)----> Organic compound Q + water +
Carbon...
(Solved)
The equation below represents a metabolic process that occurs in a certain organ in the m
mammalian body:-
Ammonia (enzymes)----> Organic compound Q + water +
Carbon (IV) oxide
a) Name the process represented in the equation.
b) Name the organ in which the process occurs.
c) Why is the process important to the mammal?
d) Identify the organic compound Q.
e) Explain the source of ammonia in the organ named in (b) above.
f) What happens to organic compound Q?
Date posted:
June 17, 2019
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Answers (1)
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State two classes of phylum chordata where all members are poikilothermic .
(Solved)
State two classes of phylum chordata where all members are poikilothermic .
Date posted:
June 17, 2019
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Answers (1)