i) Thin walled due to absence of cuticle to allow reduced distance of diffusion of water and mineral salt thus increase the rate of diffusion of molecules.
ii) Has fingerlike projections, elongated to increase surface area for absorption of water and mineral salts
iii) Presence of large vacuole with dissolved solute to increase osmotic pressure between cell sap and water in the soil
iv) Has numerous mitochondria to provide energy which allow uptake of ions by active transport
johnmulu answered the question on May 2, 2017 at 12:29
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The diagram below represents a traverse section through a plant organ
(Solved)
The diagram below represents a traverse section through a plant organ
a) From which plant organ was the section obtained
b) Give two reasons for your answer in (a) above.
c) Name the part labeled J, K and L.
d) State two functions of the parts labeled
Date posted:
May 2, 2017
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Answers (1)
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The diagram below represents regions of a root tip
(Solved)
The diagram below represents regions of a root tip
a) Name the two regions above X in ascending order.
b) State the function of the part labeled X
Date posted:
May 2, 2017
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Answers (1)
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The diagram below represents part of phloem tissue.
(Solved)
The diagram below represents part of phloem tissue.
a) Name the structure labeled R and S and the cell labeled T.
b) State the function of the structure labeled S.
c) Explain why xylem is a mechanical tissue.
Date posted:
May 2, 2017
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Answers (1)
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Name two processes that bring about the translocation of manufactured food.
(Solved)
Name two processes that bring about the translocation of manufactured food.
Date posted:
May 2, 2017
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Answers (1)
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State two ways in which xylem vessels are adapted to their function.
(Solved)
State two ways in which xylem vessels are adapted to their function.
Date posted:
May 2, 2017
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Answers (1)
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The diagram below represents the pathways of water from the soil into the plant.
(Solved)
The diagram below represents the pathways of water from the soil into the plant.
a) Name the structures labeled K and L.
b) Name the process by which minerals salts enter into the plant.
Date posted:
May 2, 2017
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Answers (1)
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The diagram below represents a transverse section of a young stem
(Solved)
The diagram below represents a transverse section of a young stem
a) Name the parts labeled A and B.
b) State the function of the parts labeled C, D and E
Date posted:
May 2, 2017
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Answers (1)
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a)Name the appropriate food substance from substance for each of the following enzymes (i)Ptyalin (ii) Pepsin
(Solved)
a)Name the appropriate food substance from substance for each of the following enzymes (i)Ptyalin (ii) Pepsin(b) State the causes and two symptoms of Beri-beri.
Date posted:
May 2, 2017
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Answers (1)
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State two ways in which the human intestinal villus is adapted to its function.
(Solved)
State two ways in which the human intestinal villus is adapted to its function.
Date posted:
May 2, 2017
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Answers (1)
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What is the role of bile salts in digestion in humans?
(Solved)
What is the role of bile salts in digestion in humans?
Date posted:
May 1, 2017
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Answers (1)
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The diagram below represents the lower jaw of a mammal
(Solved)
The diagram below represents the lower jaw of a mammal
a) Name the mode of nutrition of the mammal whose jaw is shown.
b) i) Name the toothless gap labeled K.
ii) State the function of the gap.
c) Name the substance that is responsible for hardening of teeth.
Date posted:
May 1, 2017
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Answers (1)
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Explain how the following factors determine the daily energy requirement in human:(a)Age(b)Occupation(c) Sex
(Solved)
Explain how the following factors determine the daily energy requirement in human:
(a)Age
(b)Occupation
(c) Sex
Date posted:
May 1, 2017
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Answers (1)
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Explain how the carnassial teeth of a dog are adapted to their function.
(Solved)
Explain how the carnassial teeth of a dog are adapted to their function.
Date posted:
May 1, 2017
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Answers (1)
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a) The action of ptyalin stops at the stomach. Explain.(b) State a factor that denatures enzymes(c) Name the features that increase the surface area of small intestines
(Solved)
a) The action of ptyalin stops at the stomach. Explain.
b) State a factor that denatures enzymes
c) Name the features that increase the surface area of small intestines
Date posted:
May 1, 2017
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Answers (1)
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The diagram below represents a section though a human tooth
(Solved)
The diagram below represents a section though a human tooth
a) i) Name the type of tooth shown.
ii) Give a reason for your answer in (a)(i) above.
b) State the functions of potassium ions in the human body.
Date posted:
May 1, 2017
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Answers (1)
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a) Distinguish between the terms homodont and heterodont
b) What is the function of carnassial teeth?
(Solved)
a) Distinguish between the terms homodont and heterodont
b) What is the function of carnassial teeth?
Date posted:
May 1, 2017
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Answers (1)
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What happens to excess fatty acids and glycerol in the body
(Solved)
What happens to excess fatty acids and glycerol in the body
Date posted:
May 1, 2017
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Answers (1)
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The set up below illustrates a procedure that was carried out in the laboratory with a leaf plucked from a green plant that had been growing in sunlight.
(Solved)
The set up below illustrates a procedure that was carried out in the laboratory with a leaf plucked from a green plant that had been growing in sunlight.
i) What was the purpose of the above procedure?
ii) Give reason for carrying out steps A, B and C in this procedure.
iii) Name the reagent that was used at the step labelled D.
iv) State the expected result on the leaf after adding the reagent named in (iii) above.
Date posted:
May 1, 2017
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Answers (1)
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A potted plant was kept in the dark for 48 hours. Two leaves X and Y were treated as shown in the diagram below.
(Solved)
A potted plant was kept in the dark for 48 hours. Two leaves X and Y were treated as shown in the diagram below.
The experimental set-up was kept in sun light for six hours after which a starch test was carried out on the two leaves
a) What were the results of the starch test on leaves X and Y?
b) Give reasons for your answers in (a) above
Date posted:
May 1, 2017
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Answers (1)
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The diagram below represents a set - up that was used to investigate certain process in a plant.
(Solved)
The diagram below represents a set - up that was used to investigate certain process in a plant.
a) State the process that was being investigated
b) State a factor that would affect the process
Date posted:
May 1, 2017
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Answers (1)