a) Nitrogen cycle
b) B – Ammonia / ammonium compounds;
P – Nitrates;
c) T – Thiobacillus denitrificans / Pseudomonas denitrificans;
R – Nitrosomonas; Nitroccus;
d) U – Absorption (1 mark)
Z – Death / decay / decomposition / excretion / egestion
e) Azotobacter / clostridium
sharon kalunda answered the question on September 17, 2019 at 13:54
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The diagram below shows a respiratory surface of an organism.
(Solved)
The diagram below shows a respiratory surface of an organism.
a. Name the class to which the organism having the respiratory surface belong and state its habitats.
b. Circle the letter on the diagram that represents the specific site where gaseous exchange takes place.
c. Label parts F and G.
d. Name the functions of part labeled G.
e. Give a reason why respiratory surfaces are supplied with a dense network of blood capillaries.
Date posted:
September 17, 2019
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Answers (1)
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The diagram below represents the structure of part of the placenta and how it is connected to the foetus.
(Solved)
The diagram below represents the structure of part of the placenta and how it is connected to the foetus.
a. Name the structure S and T.
b. State one substance which passes in the direction indicated by arrow Q and two substances which pass in the direction indicated by arrow R.
i) Q
ii) R
c. The blood of the mother and that of the foetus does not mix. State one advantage of this to the foetus.
d. i) Name the hormone produced by the structure drawn above.
ii) State the role of hormone named in d(i) above.
Date posted:
September 17, 2019
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Answers (1)
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In a certain variety of cattle some individuals may have red, white or roan (a mixture of white and red) fur color. A cross between...
(Solved)
In a certain variety of cattle some individuals may have red, white or roan (a mixture of white and red) fur color. A cross between a cow with red fur and a bull with white fur produced a calf with roan fur. Using letter R to represent red color and W to represent the white color ; Work out the F1 generation
Date posted:
September 17, 2019
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Answers (1)
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Explain why the carrying capacity of wild animals is higher than that of cattle for a unit mass.
(Solved)
Explain why the carrying capacity of wild animals is higher than that of cattle for a unit mass.
Date posted:
September 17, 2019
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Answers (1)
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What are the two functions of a pleural membrane that gives the mammal advantage over other organisms?
(Solved)
What are the two functions of a pleural membrane that gives the mammal advantage over other organisms?
Date posted:
September 17, 2019
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Answers (1)
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Explain why blood from the alimentary canal, pass through the liver before entering the general circulation?
(Solved)
Explain why blood from the alimentary canal, pass through the liver before entering the general circulation?
Date posted:
September 17, 2019
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Answers (1)
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Explain the relationship that occurs between the algae and fungi in lichens.
(Solved)
Explain the relationship that occurs between the algae and fungi in lichens.
Date posted:
September 17, 2019
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Answers (1)
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Study carefully the photograph shown below.
(Solved)
Study carefully the photograph shown below.
a) (i) Identify the cells above.
(ii) State two functions of the cells shown above.
b) Explain how the above cells are adapted to their function.
c) Name a parasite that may invade and destroy the cells above.
d) Suggest two bones in an adult man, which produce the cells shown above.
Date posted:
September 17, 2019
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Answers (1)
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Differentiate between miscarriage and premature birth.
(Solved)
Differentiate between miscarriage and premature birth.
Date posted:
September 17, 2019
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Answers (1)
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Study the food web below and answer the questions that follow.
(Solved)
Study the food web below and answer the questions that follow.
(a) Construct any food chain in which human is a tertiary consumer.
(b) Suggest the possible short term effects in this ecosystem if all kites migrate away.
Date posted:
September 17, 2019
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Answers (1)
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A student at Kaloleni High School picked an organism by the shore of the Indian Ocean. After examining it very carefully,she formed an opinion that...
(Solved)
A student at Kaloleni High School picked an organism by the shore of the Indian Ocean. After examining it very carefully,she formed an opinion that the organism belongs to class Arachnida. She then classified it as follows:-
Kingdom – Animalia
Phylum – Arthropoda
Class – Arachnida
(a) Identify one mistake in her classification.
(b) List down two characteristics that she could have used in placing the organism in class Arachnida.
Date posted:
September 17, 2019
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Answers (1)
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State one characteristic shared by the class Reptilia and class Aves.
(Solved)
State one characteristic shared by the class Reptilia and class Aves.
Date posted:
September 17, 2019
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Answers (1)
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What is the name of the hormone responsible for regulating the level of sodium ions in blood of a mammal?
(Solved)
What is the name of the hormone responsible for regulating the level of sodium ions in blood of a mammal?
Date posted:
September 17, 2019
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Answers (1)
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Below are photographs of specimen labeled E and F which were obtained from the same animal examine them
(Solved)
Below are photographs of specimen labeled E and F which were obtained from the same animal examine them
a) With reason identify E and F
E
Reason
F
Reason
b) On photograph E label two parts of the specimen.
Date posted:
September 17, 2019
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Answers (1)
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You are provided with photographs of specimens labeled J1,J2,K1 and K2. Examine them.
(Solved)
You are provided with photographs of specimens labeled J1,J2,K1 and K2. Examine them.
With a reason name the classes to which specimen J1 J2 K1 and K2 belongs
J1 and J2
Reason
K1 and K2
Reason
b) i) Name the parts labeled X in specimen J1
ii) What is the importance of the curvature
c) Explain how the curved part in J1 WILL straighten so that the stem will look that of J2
d) Name the part that protects the plumule in specimen K1 and K2
e) Which of the following types of seedlings may form swelling on the roots later in its life?
f) i) Name the structure found on the stem just below the leaves of specimen J2
ii) State one function of the structure named in (i) above.
g) i) What type cof germinataion is exhibited by specimen K1 and K2
ii) Give a reason for your answer in g (i) above
Date posted:
September 17, 2019
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Answers (1)
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The diagram below represents the nitrogen cycle.
(Solved)
The diagram below represents the nitrogen cycle.
a) State the process labeled A and D.
b) Name the group of organism labeled .
c) Name the compound represented by B.
d) i) Name the group of plants which promote process A.
ii) State the part of the plant where process A takes place.
e) How would excess pesticides in the soil interfere with process A.
Date posted:
September 17, 2019
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Answers (1)
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In humans haemophilia is caused by a recessive gene. A man whose mother was hemophiliac marries a normal woman whose father was hemophiliac let H...
(Solved)
In humans haemophilia is caused by a recessive gene. A man whose mother was hemophiliac marries a normal woman whose father was hemophiliac let H represent dominant gene.
a) Define the term recessive gene.
b) What is the possible genotype of the woman?
ii) Using punnet square work out the genotype of the first filial generation. Show your working.
c) i) What is the probability of the daughter being haemophilic?
ii) State one advantage of mutation to plants.
Date posted:
September 17, 2019
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Answers (1)
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Active yeast cells were added to dilute sugar solution in a container. The mixture was left in a warm room. After a few hour bubbles...
(Solved)
Active yeast cells were added to dilute sugar solution in a container. The mixture was left in a warm room. After a few hour bubbles of gases were observed escaping from the mixture.
a) Write an equation to represent the chemical process
b) What is the importance of the type of reaction in industries?
Date posted:
September 17, 2019
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Answers (1)
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Complete the table below for mineral nutrients in plants.
(Solved)
Complete the table below for mineral nutrients in plants.
Date posted:
September 17, 2019
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Answers (1)
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The diagram below represents a bone in a mammal.
(Solved)
The diagram below represents a bone in a mammal.
a) Identify the bone.
b) Name the bone that articulate with the above bone at part A.
c) Name the joint formed at the part labeled B.
Date posted:
September 17, 2019
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Answers (1)