a) i) Chordata;
ii) Pisces;
Reason - Has fins;
- Gills;
- Operculum;
- Lateral line;
b) Streamlined shape;
c) i) A - lateral line;
B - Operculum;
ii) C- Prevent rolling and yawing;
D - Balance/braking;
d) -Presence of fins;
- Presence of scales;
- Has streamlined body;
sharon kalunda answered the question on September 17, 2019 at 14:00
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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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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
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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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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.
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Date posted:
September 17, 2019
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Answers (1)
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Four cylinders of potato were carefully dried on blotting paper and weighed. Each piece weighed 3g. One was placed in each as shown in the...
(Solved)
Four cylinders of potato were carefully dried on blotting paper and weighed. Each piece weighed 3g. One was placed in each as shown in the drawing below.

a) After 48hours, which potato would be the heaviest
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c) Name the process which was responsible for this movement in tubes B, C and D.
Date posted:
September 17, 2019
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Answers (1)
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In an experiment, Euglena was put in a petri dish. One side of the petri dish was illuminated and the other kept dark as shown...
(Solved)
In an experiment, Euglena was put in a petri dish. One side of the petri dish was illuminated and the other kept dark as shown below.

a) Name this type of response.
b) State the significance of this type of response in an organism.
c) Other than light, outline other two factors that may cause change of position in Euglena and state the respective type of response.
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Date posted:
September 17, 2019
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Answers (1)
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What is the process that leads to addition or loss of one or more chromosomes?
(Solved)
What is the process that leads to addition or loss of one or more chromosomes?
Date posted:
September 17, 2019
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Answers (1)
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Study the diagram below and answer the questions that follow.
(Solved)
Study the diagram below and answer the questions that follow.

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Date posted:
September 17, 2019
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Answers (1)
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The set apparatus was assembled by a group of students to investigate some physiological process.
(Solved)
The set apparatus was assembled by a group of students to investigate some physiological process.

a) i) Give two aims of the experiment.
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b) Before the experiment, the glucose was boiled the cooled.
i) Why was it necessary to boil the solution?
ii) What was the importance of the oil layer in the experiment?
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Date posted:
September 17, 2019
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Answers (1)
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In an experiment, three healthy rabbits were fed with equal amounts of carbohydrates. After 1 hour their blood sugar glucose concentration was measured at 30...
(Solved)
In an experiment, three healthy rabbits were fed with equal amounts of carbohydrates. After 1 hour their blood sugar glucose concentration was measured at 30 minutes intervals for 3 hour. The results are as shown in the table below.

a.(i) Calculate the mean glucose concentration 1mg/ml of blood at 60 and 180 minutes.

(ii) On the grid provided plot a graph of mean glucose concentration against time.
(iii) What was the mean concentration in the blood after 75 minutes?
(iv)Why was it necessary to use 3 rabbits in the experiment?
v) Account for differences in mean glucose concentration between initial time and 180 minutes.
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(i) Plants?
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Date posted:
September 17, 2019
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Answers (1)
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The diagram below shows a section through the mammalian skin.
(Solved)
The diagram below shows a section through the mammalian skin.

a. Name the parts labeled Y and X
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Date posted:
September 17, 2019
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Answers (1)
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The diagram below shows a flow chart of blood clotting mechanism in a human.
(Solved)
The diagram below shows a flow chart of blood clotting mechanism in a human.

a) Name the enzymes represented by the letters T and S.
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Date posted:
September 17, 2019
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Answers (1)
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The diagram below represents the vertical section of a fruit.
(Solved)
The diagram below represents the vertical section of a fruit.

a) Suggest the possible agent of dispersal of this fruit.
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Date posted:
September 17, 2019
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Answers (1)
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A cross between a red flowered plants and white flowered plants produced plants with pink flowers. Using letter R to represent the gene for red...
(Solved)
A cross between a red flowered plants and white flowered plants produced plants with pink flowers. Using letter R to represent the gene for red color and W for white.
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Date posted:
September 17, 2019
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Answers (1)
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The flow diagram below represents passage of a meal through the human digestive system. Study the diagram and answer the questions that follow.
(Solved)
The flow diagram below represents passage of a meal through the human digestive system. Study the diagram and answer the questions that follow.

(a) Name the physical process that will occur in mouth cavity
(b) Name the digestive juices B and C
B...........................
C...........................
(c) Explain two ways in which the digestive system is protected from corrosive effects of digestive juices.
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(e) Identify two contents of digestive juice A
Date posted:
September 17, 2019
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Answers (1)
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Name the source of hydrochloric acid in the mammalian stomach.
(Solved)
Name the source of hydrochloric acid in the mammalian stomach.
Date posted:
September 17, 2019
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Answers (1)
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An experiment shown below was a set up to investigate a certain physiological process in plants.
(Solved)
An experiment shown below was a set up to investigate a certain physiological process in plants.

a) What process was being investigated? (1 mark)
b) What effect will the following have on the observation made in (a) above?
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iii) Placing the set up in the dark.
Date posted:
September 17, 2019
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Answers (1)
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The following diagram of a leaf shows what happens in a plant leaf during photosynthesis.
(Solved)
The following diagram of a leaf shows what happens in a plant leaf during photosynthesis.

(a) State two ways in which leaves are adapted to absorb light.
(b) Name the gases labeled x and y.
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(i) Water into the leaf.
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Date posted:
September 16, 2019
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Answers (1)
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The apparatus below illustrate breathing in a mammal.
(Solved)
The apparatus below illustrate breathing in a mammal.

(a) Describe what happens if the rubber plug is pulled in the direction shown by the arrow.
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Date posted:
September 16, 2019
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Answers (1)
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Explain how dioecism prevent self-pollination
(Solved)
Explain how dioecism prevent self-pollination
Date posted:
September 16, 2019
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Answers (1)