1. Abscisic acid.
2. Auxins.
3. Cytokinins.
4. Ethylene.
5. Gibberellins
johnmulu answered the question on May 12, 2017 at 08:35
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The diagram below represents a set up to investigate the conditions necessary for seed germination.
(Solved)
The diagram below represents a set up to investigate the conditions necessary for seed germination.
The set up was left for 7 days.
(a) What conditions were being investigated in the experiment?
(b) State three reasons for soaking seeds in set ups A and B.
(c) What were the expected results after seven days
Date posted:
May 12, 2017
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Answers (1)
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The diagram below represents human foetus in a uterus.
(Solved)
The diagram below represents human foetus in a uterus.
(a) Name the part labeled S.
(b)(i) Name the types of blood vessels found in the structures labeled Q.
(ii) State the differences in composition of blood found in the vessels named in (b) above
(c) Name two features that enable the structure labelled P carry out its function
(d) State the role of the part labeled R.
Date posted:
May 12, 2017
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Answers (1)
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The diagram below represents a stage during cell division
(Solved)
The diagram below represents a stage during cell division
(a) (i) Identify the stage of cell division
(ii) Give three reasons for your answer in (a) (i) above
(b) Name the structures labeled M.
(c) State the significance of this stage of cell division in living organisms.
Date posted:
May 9, 2017
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Answers (1)
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The chart below shows the number of chromosomes before and after cell division and fertilization in a mammal.
(Solved)
The chart below shows the number of chromosomes before and after cell division and fertilization in a mammal.
(a) What type of cell division takes place at Z.
(b) Where in the body of a female does process Z occur.
(c) Name the process that leads to addition or loss of one or more chromosomes
(d) Name the process that leads to addition or loss of one or more chromosomes
(e) State three benefits of polyloidy in plants to a farmer.
Date posted:
May 9, 2017
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Answers (1)
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Explain how the following prevent self-pollination. (i) Protandry (ii) Self-sterility.
(Solved)
Explain how the following prevent self-pollination. (i) Protandry (ii) Self-sterility.
Date posted:
May 9, 2017
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Answers (1)
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The diagram below illustrates the structure of the female part of a flower.
(Solved)
The diagram below illustrates the structure of the female part of a flower.
(a) Name the part labelled W.
(b) Describe what happens when pollen tubes enters the structure labelled V
(c) What do structures labelled R and T develop into after fertilization?
Date posted:
May 9, 2017
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Answers (1)
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State four characteristics of fruit dispersed by animals.
(Solved)
State four characteristics of fruit dispersed by animals.
Date posted:
May 9, 2017
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Answers (1)
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The diagram below illustrates a growing pollen tube.
(Solved)
The diagram below illustrates a growing pollen tube.
(a) Name the part labeled B.
(b) Explain the role of the parts labeled A.
Date posted:
May 9, 2017
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Answers (1)
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Name three mechanisms that ensure cross pollination takes place in flowering plants.
(Solved)
Name three mechanisms that ensure cross pollination takes place in flowering plants.
Date posted:
May 9, 2017
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Answers (1)
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The diagram below represent a transverse section of an ovary from a certain flower.
(Solved)
The diagram below represent a transverse section of an ovary from a certain flower.
(i) Name the structure labeled W.
(ii) Name the type of placentation illustrated in this diagram
Date posted:
May 9, 2017
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Answers (1)
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A flower was found to have the following characteristics:
Inconspicuous petals
Long feathery stigma
Small, light pollen grains
(a) What is the likely agent of pollination of the flower?
(b) What is the significance of the flower?
(Solved)
A flower was found to have the following characteristics:
Inconspicuous petals
Long feathery stigma
Small, light pollen grains
(a) What is the likely agent of pollination of the flower?
(b) What is the significance of the flower?
Date posted:
May 9, 2017
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Answers (1)
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State three characteristics that ensures cross-pollination takes place in flowering plants.
(Solved)
State three characteristics that ensures cross-pollination takes place in flowering plants.
Date posted:
May 9, 2017
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Answers (1)
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The diagram below shows a transverse section of a leaf.
(Solved)
The diagram below shows a transverse section of a leaf.
(a) Name the habitat of the plant from which the leaf is obtained.
(b) Give two reasons for your answer in (a) above.
Date posted:
May 8, 2017
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Answers (1)
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Other than using the quadrat, give two methods of estimating population of grass.
(Solved)
Other than using the quadrat, give two methods of estimating population of grass.
Date posted:
May 8, 2017
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Answers (1)
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How is aerenchyma tissue adapted to its function
(Solved)
How is aerenchyma tissue adapted to its function
Date posted:
May 8, 2017
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Answers (1)
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(a) Name the bacteria found in the root nodules of leguminous plant.
(b) State the association of the bacteria named in (a) above with the leguminous plants.
(Solved)
(a) Name the bacteria found in the root nodules of leguminous plant.
(b) State the association of the bacteria named in (a) above with the leguminous plants.
Date posted:
May 8, 2017
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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..
D..
(b) Name the compound represented by B
(c) Name the group of organisms labeled C
(d) How would excess pesticides in the soil interfere with process A.
Date posted:
May 8, 2017
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Answers (1)
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Explain how birds of prey are adapted to obtaining their food.
(Solved)
Explain how birds of prey are adapted to obtaining their food.
Date posted:
May 8, 2017
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Answers (1)
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Suggest three reasons why green plants are included in a fish aquarium.
(Solved)
Suggest three reasons why green plants are included in a fish aquarium.
Date posted:
May 8, 2017
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Answers (1)
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Give two reasons why primary productivity in an aquatic ecosystem decreases with depth.
(Solved)
Give two reasons why primary productivity in an aquatic ecosystem decreases with depth.
Date posted:
May 8, 2017
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Answers (1)