Reduce oxygen supply and hence suffocation and death of plants and animals, clog respiratory surfaces (gills and stomata) leading to death;
Kavungya answered the question on June 15, 2019 at 06:34
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Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
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Using a sweep net he captured 36 grasshoppers. He...(Solved)
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a) Name the above method used in the population estimation
b) Calculate the population of grasshoppers using the above data
Date posted: June 15, 2019. Answers (1)
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Date posted: June 14, 2019. Answers (1)
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Date posted: June 14, 2019. Answers (1)
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a) What...(Solved)
The graph below shows the changes in transpiration rate and the width of the stomatal aperture in Zea mays (maize) over a 24-hour period.
a) What is meant by the term transpiration?
b) Account for the rate of transpiration between
i)3am and 5am
ii)6am -12 noon
iii)1.00 pm -9.00 pm
Date posted: June 14, 2019. Answers (1)
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Date posted: June 14, 2019. Answers (1)
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Date posted: June 14, 2019. Answers (1)
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Date posted: June 14, 2019. Answers (1)
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ii) Fusion of petals to form funnel-shaped corolla...(Solved)
Suggest the biological significance of each of the following
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Date posted: June 14, 2019. Answers (1)
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The diagram below shows exchange of materials between embryo’s bloodstreams and mother’s blood stream
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E
G
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Date posted: June 14, 2019. Answers (1)
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a) Draw a diagram in the space below to...(Solved)
When storing a pair of bar magnets, it is advisable to put a keeper at each end.
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Date posted: May 29, 2019. Answers (1)
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Date posted: May 29, 2019. Answers (1)
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Date posted: May 29, 2019. Answers (1)
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to water and put inside a visking tubing. The visking tubing was...(Solved)
In a physiological experiment, starch, protein, diastase and sodium chloride (common salt) were added
to water and put inside a visking tubing. The visking tubing was then placed in a water bath maintained at a temperature between 350C and 400C. The set-up was as shown in the diagram below.
The following observations were made after the procedures indicated.
(a) Name the process by which salt moved into the water in the beaker from the visking tubing.
(b) (i) Name the food substance responsible for the brown colour observed after one hour both in the beaker and visking tubing when solutions were boiled with Benedict’s solution.
(ii) Account for the observation in b(i) above.
(c) (i) Name the food substance tested with sodium hydroxide followed by copper sulphate solutions.
(ii) Account for the absence of the food substance named in c(i) above in the beaker after1 hour.
(d) After one hour, the visking tubing was firm. State the term used to describe this state.
Date posted: May 29, 2019. Answers (1)
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(a) Name the structures labelled H and J....(Solved)
The diagram below represents a section through the mammalian ear. Study it and answer the questions that follow.
(a) Name the structures labelled H and J.
(b) State how the structures labelled H, M and N are adapted to their functions. H,M,N.
(c) State what would happen if the structure labelled K was completely damaged?.
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(e) Apart from hearing, state the other role performed by the human ear.
Date posted: May 29, 2019. Answers (1)