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The plant is self-sterile hence cross-pollination occurs. Since Q had stigma exposed to receive pollen grains from other plants. P was covered hence pollen grains from the other plant could not land on the stigma preventing cross-pollination, hence no fertilization.
johnmulu answered the question on May 9, 2017 at 07:02
- 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. Answers (1)
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Distinguish between protandry and protogyny
Date posted: May 9, 2017. Answers (1)
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The diagram below shows a stage in mitosis in a plant cell.
(a) Name the stage of mitosis.
(b) Give two reasons for your answer in (a) above
(c) Name the part of the plant from which the cell used in preparation was obtained.
Date posted: May 9, 2017. Answers (1)
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(b) Give three advantages of cross pollination. (Solved)
(a) Explain how the following prevent self-pollination (i) Protandry (ii) Self-sterility
(b) Give three advantages of cross pollination.
Date posted: May 9, 2017. Answers (1)
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Date posted: May 9, 2017. Answers (1)
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(b) How are the male parts of wind pollinated flowers adapted to their function? (Solved)
(a) What is meant by the terms (i) Epigynous flower (ii) Staminate flower
(b) How are the male parts of wind pollinated flowers adapted to their function?
Date posted: May 9, 2017. Answers (1)
- Fruit formation without fertilization is called(Solved)
Fruit formation without fertilization is called
Date posted: May 9, 2017. Answers (1)
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How do the male gamete nuclei reach the ovule after pollen grains land on the stigma?
Date posted: May 9, 2017. Answers (1)
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Name the parts of the flower that are responsible the production of gametes.
Date posted: May 9, 2017. Answers (1)
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State two disadvantages of self-pollination
Date posted: May 9, 2017. Answers (1)
- 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. Answers (1)
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State three characteristics that ensures cross-pollination takes place in flowering plants.
Date posted: May 9, 2017. Answers (1)
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Date posted: May 8, 2017. Answers (1)
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Date posted: May 8, 2017. Answers (1)
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Name the process through which free atmospheric nitrogen is converted into nitrates
Date posted: May 8, 2017. Answers (1)
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The diagram below represents a certain plant.
(a) What is the likely habitat for the plant?
(b) Give two reasons for your answer in (a)
Date posted: May 8, 2017. Answers (1)
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(a) Ecology
(b) Carrying capacity (Solved)
What is meant by the following terms?
(a) Ecology
(b) Carrying capacity
Date posted: May 8, 2017. Answers (1)
- The figure below illustrates a food web in a certain ecosystem. (Solved)
The figure below illustrates a food web in a certain ecosystem.
From the food web:
(a) Draw the shortest food chain;
(b) Identify the organisms with the highest (i) Number of predators;
(ii) Biomass.
Date posted: May 8, 2017. Answers (1)
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What is meant by the following terms?
(a) Habitat;
(b) Ecosystem
Date posted: May 8, 2017. Answers (1)
- 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. Answers (1)