-Oxygen.
-Carbon (IV)Oxide.
-Methane.
-Nitrogen.
jim items answered the question on March 28, 2019 at 06:13
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Explain why water logging of the soil may lead to death in plants
(Solved)
Explain why water logging of the soil may lead to death in plants.
Date posted:
March 26, 2019
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Answers (1)
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The diagram below shows part of plant tissue.
(Solved)
The diagram below shows part of plant tissue.
(i) Name the cell labelled X and part labelled W.
(ii) State two adaptations of cell labelled X to its functions.
Date posted:
March 22, 2019
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Answers (1)
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If the nerve supply to the heart of a mammal is servered, the rhythmic heart movement will still go on and the heart continues to...
(Solved)
If the nerve supply to the heart of a mammal is servered, the rhythmic heart movement will still go on and the heart continues to beat. Explain this observation
Date posted:
March 22, 2019
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Answers (1)
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The action of pepsin stops in the duodenum. Explain.
(Solved)
The action of pepsin stops in the duodenum. Explain.
Date posted:
March 22, 2019
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Answers (1)
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What is the importance of heartbeat in blood circulation?
(Solved)
What is the importance of heartbeat in blood circulation?
Date posted:
March 22, 2019
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Answers (1)
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The figure below shows a stem of a plant growing round a tree trunk
(Solved)
The figure below shows a stem of a plant growing round a tree trunk
a) What is the name of the response which causes such a twisted growth?
b) Explain how twisting process is accomplished
Date posted:
March 22, 2019
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Answers (1)
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State three features that a grasshopper, a crab, a spider and a millipede have in common.
(Solved)
State three features that a grasshopper, a crab, a spider and a millipede have in common.
Date posted:
March 22, 2019
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Answers (1)
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In what form is carbon IV oxide transported in blood?
(Solved)
In what form is carbon IV oxide transported in blood?
Date posted:
March 22, 2019
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Answers (1)
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State the importance of each of the following features in animals;
a) Solid food being broken down into small pieces.
b) Presence of caecum in herbivorous mammals.
(Solved)
State the importance of each of the following features in animals;
a) Solid food being broken down into small pieces.
b) Presence of caecum in herbivorous mammals.
Date posted:
March 22, 2019
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Answers (1)
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Distinguish between identical twins and fraternal twins.
(Solved)
Distinguish between identical twins and fraternal twins.
Date posted:
March 22, 2019
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Answers (1)
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Name the fins that prevent the following movements of fish during swimming.
(i) Yawing
(ii) Pitching
(iii) Rolling
(Solved)
Name the fins that prevent the following movements of fish during swimming.
(i) Yawing
(ii) Pitching
(iii) Rolling
Date posted:
March 22, 2019
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Answers (1)
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What happens when respiration exceeds photosynthesis in the guard cells of terrestrial plants?
(Solved)
What happens when respiration exceeds photosynthesis in the guard cells of terrestrial plants?
Date posted:
March 22, 2019
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Answers (1)
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Two populations of the same species of birds were separated over a long period of time by an ocean. Both populations initially fed on insects...
(Solved)
Two populations of the same species of birds were separated over a long period of time by an ocean. Both populations initially fed on insects only but later it was observed that one population fed entirely on fruits and seeds although insects were available. Name;
(a) The type of isolation.
(b) The type of evolutionary change.
(c) What are vestigial structures?
(d) Name one vestigial structure in man.
Date posted:
March 21, 2019
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Answers (1)
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Eight potato cylinder of the same size were used to investigate a certain physiological process. Four of the potato cylinders were placed in solution S....
(Solved)
Eight potato cylinder of the same size were used to investigate a certain physiological process. Four of the potato cylinders were placed in solution S. The other four potato cylinders were placed in solution T. After 2 hours, the potato cylinders from solution S were found to longer and stiff, while those from solution T were found to be shorter and flexible. Explain the
results in solution S and T.
(b) Distinguish between active transport and diffusion.
Date posted:
March 21, 2019
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Answers (1)
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List two enzymes that are secreted in their precursor forms.
(Solved)
List two enzymes that are secreted in their precursor forms.
Date posted:
March 21, 2019
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Answers (1)
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Three tubes each containing 1ml saliva and 1ml water were incubated in water baths at different temperatures as shown in the diagram below for 30...
(Solved)
Three tubes each containing 1ml saliva and 1ml water were incubated in water baths at different temperatures as shown in the diagram below for 30 minutes. Another one tube containing 1ml starch solution was incubated for the same length of time in each water bath. The contents of the two tubes in each water bath was then mixed and incubated for further 30 minutes.The content of each tube was then tested for starch using iodine solution.
a) What was the aim of the experiment?
(b) Why was it necessary to incubate the tubes for 30 minutes before mixing their contents?
(c) State the colour changes you would expect to observe after adding iodine solution.
(d) Account for the expected observations.
Date posted:
March 21, 2019
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Answers (1)
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What biological knowledge or study is required in dealing with locusts that infest a maize crop.
(Solved)
What biological knowledge or study is required in dealing with locusts that infest a maize crop.
Date posted:
March 21, 2019
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Answers (1)
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Describe the digestion, absorption and assimilation of milk in humans.
(Solved)
Describe the digestion, absorption and assimilation of milk in humans.
Date posted:
March 15, 2019
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Answers (1)
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Explain the Ways in which erect posture is maintained in a Weak herbaceous stem
(Solved)
Explain the Ways in which erect posture is maintained in a Weak herbaceous stem
Date posted:
March 14, 2019
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Answers (1)
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State two differences between biceps and muscles of the intestines.
(Solved)
State two differences between biceps and muscles of the intestines.
Date posted:
March 12, 2019
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Answers (1)