a) i) Denitrification
ii) Absorption
iii) Consumption /feeding
b) i) Nitrifying bacteria
ii) Nitrogen fixing bacteria
iii) Saprophytes
c) i) Proteins
ii) Nitrogen gas
sharon kalunda answered the question on September 18, 2019 at 08:15
- Pea seedlings were treated as follows;
Seedling A - Coleoptiles tip was cut off, metal block placed, then tip placed back.
Seedling B - Coleoptiles tip was...(Solved)
Pea seedlings were treated as follows;
Seedling A - Coleoptiles tip was cut off, metal block placed, then tip placed back.
Seedling B - Coleoptiles tip was cut off, agar block placed then tip placed back.
Seedling C - Was left intact.
The seedlings A, B and C were placed in dark box with a small hole at one side as illustrated in the diagram below;
a) State what was being investigated in the set up above.
b) Using diagrams illustrate how the seedlings A, B and C appear after 48 hours.
c) Explain the results in (b) above;
Date posted: September 18, 2019. Answers (1)
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a) Calculate the...(Solved)
In an experiment using germinating seeds, it was found that 18cm3 of carbon (IV) oxide was released while 17.6cm3 of oxygen was used.
a) Calculate the respiratory quotient (RQ).
b) State the type of respiration occurring.
c) What is the likely respiratory substrate?
Date posted: September 18, 2019. Answers (1)
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Date posted: September 18, 2019. Answers (1)
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Water ? Hydrogen atoms + Oxygen(Solved)
The following process takes place in a plant organelle.
Water → Hydrogen atoms + Oxygen
i) Identify the organelle in which the process takes place.
ii) Name the process.
iii) State two conditions required for the process to take place.
Date posted: September 18, 2019. Answers (1)
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The figure represents different types of muscles. Study them carefully and answer the questions that follow.
(i) Identify the muscles labelled C and B.
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(iii) State one function of each of the muscles labelled B and C.
(iv) Give one adaptation of a muscle labelled C to its function.
Date posted: September 18, 2019. Answers (1)
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Photographs B, C and D below represent support structures in plants. Use them to answer the questions that follow.
(i) Name the support structure represented by photograph B
(ii) Explain briefly how the coiling in photograph B occurs
(iii) Name the structures labeled L on photograph C.
iv). Photograph D is a magnified photomicrograph of support tissues found in part x of photograph C. Give the name of the tissue labeled t.
(vi) Describe the structure of the cells of the tissue named in (a) (iv) above
Date posted: September 18, 2019. Answers (1)
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(b) State two functions of the waste product named in (a) above.(Solved)
a)Name the excretory product produced in the liver and used in the intestine.
(b) State two functions of the waste product named in (a) above.
Date posted: September 18, 2019. Answers (1)
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a) i) Identify the organism with the largest biomass.
ii) Give a reason for your answer in a (i) above.
b) From the food web, isolate a food chain ending with snakes as tertiary consumers.
c) i) Name any two organisms not shown in the food web but would be present in the ecosystem.
ii) What is the role of the organisms stated in c (i) above?
d) From the food web, snakes and leopards feed on rabbits. What name is given to this kind of competition?
e) From the food web, name an organism that may be both a secondary and a tertiary consumer.
Date posted: September 18, 2019. Answers (1)
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A cross between a red forward and white flowered plant produce plants with flowers having red and white patches.
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b) Work out a cross between the F1 plants.
c) State the phenotypic ratio of F2 plants.
d) State the genotypic ratio of F2 plants.
Date posted: September 18, 2019. Answers (1)
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A blood group A mother gave birth to a blood group O child with a blood group B husband.
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Date posted: September 18, 2019. Answers (1)
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Date posted: September 18, 2019. Answers (1)
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Study the diagram below.
a) Name the parts A, B and C.
b) Name the division to which the organism belong.
c) State two roles of the structure labelled D.
Date posted: September 18, 2019. Answers (1)
- Name the photoreceptor cells in retina that respond to
(i) Dim light
(ii) Bright light(Solved)
Name the photoreceptor cells in retina that respond to
(i) Dim light
(ii) Bright light
Date posted: September 18, 2019. Answers (1)
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The figure below illustrate specialised cells in an animal.
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b) Name three organs systems where the cells named in (a) above are found.
Date posted: September 18, 2019. Answers (1)
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In an experiment two equal volumes of solution L and M were placed into visking tubing. The visking tubing was suspended into beakers containing equal volumes of solutions K. The set –up is as shown in the diagram A and B. The set-up was allowed to stand for 45 minutes and results are as shown in the diagrams.
(a) Name the process that was being demonstrated.
(b) Explain the results that were obtained at the end of the experiment in
(i) Set-up A.
(ii) Set up B.
Date posted: September 18, 2019. Answers (1)
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Name two regions in human body that displays counter-current flow system.
Date posted: September 17, 2019. Answers (1)
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i) Pawpaw
ii) Orange
iii) Bean pod(Solved)
State the type of placentation found in the following fruits.
i) Pawpaw
ii) Orange
iii) Bean pod
Date posted: September 17, 2019. Answers (1)
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Study the diagram below and answer question that follow.
i) Epithelial layer above is located in the nasal cavity.
Name the structure labeled A and B
ii) State the significance of the structure A.
Date posted: September 17, 2019. Answers (1)
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Diagram below represents a type of muscle.
a) Identify the type of muscle shown above.
b) Name two parts of human body where this type of muscle can be found.
Date posted: September 17, 2019. Answers (1)
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Study the diagram below and answer question that follow
a) Identify the structures shown in figure above.
b) Identify
i) Part B
ii) Part C
iii) Gas X
Date posted: September 17, 2019. Answers (1)