(a) Plasmolysis
(b) X – Plasmolysed (Flaccids)
Z – Turgid
(c) P– Sap/cell sap
Y – Hypotonic solution
(d) Name the part labeled M and Q
M- Cell wall
Q – Cell membrane
(e) Chloroplast
marto answered the question on September 30, 2019 at 10:40
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In an experiment to analyze a 200cm3 sample of air was treated with pyrogallic acid. This reduced its volume to 168cm3. Potassium hydroxide was then...
(Solved)
In an experiment to analyze a 200cm3 sample of air was treated with pyrogallic acid. This reduced its volume to 168cm3. Potassium hydroxide was then added and the volume of gas reduced further to 160cm3.
(a) What was the role of pyrogallic acid?
(b) What was the role of potassium hydroxide?
(c) Calculate the percentage of oxygen and percentage of carbon (iv) oxide in the sample
(d) Suggest the likely biological source of carbon (iv)oxide gas.
(e) State the behavior of external intercostal muscles during exhalation.
(f) Explain why smokers are more prone to respiratory tract infections than the non- smokers
Date posted:
September 30, 2019
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Answers (1)
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The following diagram shows a cell at a certain stage of cell division.
(Solved)
The following diagram shows a cell at a certain stage of cell division.
a) Name the type and stage of cell division.
Type
Stage
(b) (i) Give one reason for your answer in (a) above
(ii) What is the significance of the process shown in the diagram above in relation to the
behavior of chromosomes?
(c) What is the general name of organs where the above process occurs?
(d) Name the part labeled;
C
F
(e) State the significance of part labeled A in relation to the process shown above ?
(f) Name one cell in plants which is haploid
Date posted:
September 30, 2019
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Answers (1)
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The diagram below represents a nitrogen cycle. (a) Name the groups of organism represented by J.....
(Solved)
The diagram below represents a nitrogen cycle.
(a) Name the groups of organism represented by J.
(b) Name the process represented by R,P,M and N.
(c) Name one process represented by T.
(d) (i) Name a structure in roots involved in process M.
(ii) State one adaptation of the structure named in d (i) above to its function
Date posted:
September 30, 2019
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Answers (1)
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The diagram below shows a stage of a certain type of cell division.
(Solved)
The diagram below shows a stage of a certain type of cell division.
a) Identify the stage and type of the cell division the above cell is undergoing.
b) State two importance of the above type of cell division
Date posted:
September 30, 2019
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Answers (1)
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In a capture-recapture exercise to estimate population size of dragon flies on a stretch of rivers, 250flies were first caught and marked. Two days later...
(Solved)
In a capture-recapture exercise to estimate population size of dragon flies on a stretch of rivers, 250flies were first caught and marked. Two days later 500 flies were caught in the second capture and out of this, 50 flies had marks on their bodies. Estimate the population size of the flies. (show your working)
Date posted:
September 30, 2019
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Answers (1)
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Explain the following Phenomena “Stomata generally open during the day and close at night”.
(Solved)
Explain the following Phenomena “Stomata generally open during the day and close at night”.
Date posted:
September 30, 2019
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Answers (1)
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State four behavioural pattern or activities shown by terrestrial animals to their adaptations in habitats.
(Solved)
State four behavioural pattern or activities shown by terrestrial animals to their adaptations in habitats.
Date posted:
September 30, 2019
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Answers (1)
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Pregnancy would persist after the expiry of the fifth month of pregnancy even if the two ovaries are surgically removed from the body of female...
(Solved)
Pregnancy would persist after the expiry of the fifth month of pregnancy even if the two ovaries are surgically removed from the body of female individual. Give an account for this.
Date posted:
September 30, 2019
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Answers (1)
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State the adaptive structural differences between nephrons of desert and fresh water animals.
(Solved)
State the adaptive structural differences between nephrons of desert and fresh water animals.
Date posted:
September 30, 2019
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Answers (1)
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During cold weather, very small mammals eat more than their own weight of food per day whereas large mammals eat food which is only a...
(Solved)
During cold weather, very small mammals eat more than their own weight of food per day whereas large mammals eat food which is only a small fraction of their weight. Give an explanation for this.
Date posted:
September 30, 2019
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Answers (1)
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State the advantage of breeding seasons in Mammals other than Man?
(Solved)
State the advantage of breeding seasons in Mammals other than Man?
Date posted:
September 30, 2019
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Answers (1)
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State the function of interstitial cells found in testis.
(Solved)
State the function of interstitial cells found in testis.
Date posted:
September 30, 2019
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Answers (1)
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During a surgical operation, a doctor accidentally cut two blood vessels A and B. Out of blood vessel A, blood was spurting out while through...
(Solved)
During a surgical operation, a doctor accidentally cut two blood vessels A and B. Out of blood vessel A, blood was spurting out while through blood vessel B, blood was flowing smoothly.
i) Identify blood vessels A and B.
Date posted:
September 30, 2019
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Answers (1)
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Name one hormone which promotes spermatogenesis in human males.
(Solved)
Name one hormone which promotes spermatogenesis in human males.
Date posted:
September 30, 2019
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Answers (1)
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A student examining pond water came across a certain living organisms which he drew as shown below.
(Solved)
A student examining pond water came across a certain living organisms which he drew as shown below.
i) Identify the organism shown above.
ii) State the kingdom of the above organism.
iii) Name the structure labeled A.
iv) State the function of the part labeled B.
Date posted:
September 30, 2019
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Answers (1)
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State the circumstances in which more blood Sugar may be found in the hepatic portal vein than in any other blood vessels.
(Solved)
State the circumstances in which more blood Sugar may be found in the hepatic portal vein than in any other blood vessels.
Date posted:
September 30, 2019
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Answers (1)
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A form three student came across two different types of fruits which are described as follows
(Solved)
A form three student came across two different types of fruits which are described as follows:
Fruit A
Has free central placentation, hard epicarp and fibres air-filled mesocarp.
Fruit B
Hasaxile placentation, fleshy mesocarp and brightly colouredepicarp.
a) Suggest the possible agent of dispersal of each type of fruit
Date posted:
September 30, 2019
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Answers (1)
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State a way in which size is an important factor in temperature regulation in Mammals.
(Solved)
State a way in which size is an important factor in temperature regulation in Mammals.
Date posted:
September 30, 2019
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Answers (1)
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Which part of the body produce Antidiuretic hormone.
(Solved)
Which part of the body produce Antidiuretic hormone.
Date posted:
September 30, 2019
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Answers (1)
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Name and state the functions of four valves found in Mammalian heart.
(Solved)
Name and state the functions of four valves found in Mammalian heart.
Date posted:
September 30, 2019
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Answers (1)