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Form 3 Biology video questions and answers on reproduction in plants
Fruits formation without fertilization is called
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Answer Text:
- Parthenocarpy
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1.
Describe how insect pollinated flowers are adapted to pollination
2.
State three characteristics that ensure cross-pollination takes place in flowering plants.
3.
A flower was found to have the following characteristics: Inconspicuous petal 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 long feathery stigma in the flower?
4.
State two disadvantages of self-pollination.
5.
Name the parts of the flower that are responsible the production of gametes.
6.
(a) Describe the process of fertilization in a flowering plant (b) State the change that takes in a flower after fertilization.
7.
How do the male gamete nuclei reach the ovule after pollen grains land on the stigma?
8.
Describe how fruits and seeds are suited to their modes of dispersal.
9.
Fruits formation without fertilization is called
10.
(a) What is the importance of cross pollination? (b) Explain how a seed is formed after an ovule is fertilized.
11.
(a) What is meant by the terms (i) Epigynous flower (ii) Staminate flower (b) How are the male parts of wind pollinated adapted to their function?
12.
Name the part of the flower that develops into (a) Seed (b) Fruit
13.
(a) Explain how the following prevent selfpollination (i) Protandry (ii) Self-sterility (b) Give three advantages of cross pollination
14.
(a) The diagram below shows a stage during fertilization in a plant (i) Name the parts labeled Q, R and S. (ii) State two functions of the pollen tube. (b) On the diagram label the micropyle
15.
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.
16.
Distinguish between protandary and protogyny.
17.
How are flowers adapted to wind and insect pollination?
18.
Describe the process of fertilization in flowering plants.
19.
The diagram below represents 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.
20.
The diagram below represents a flower. On the diagram , name two structures where meosis occurs.
21.
The diagram below represents an experimental set-up used by students to investigate a certain process. Flower Q produced seeds while P did not. Account for the results.
22.
Name three mechanisms that ensure cross pollination takes place in flowering plants.
23.
Name the flower part that produces gametes.
24.
The diagram below illustrates a growing pollen tube. (a) Name the part labeled B (b) Explain the role of the parts A.
25.
State four characteristics of fruits dispersed by animals.
26.
The photographs below show the various stages of cell division in a certain plant. (a)(i)Name the type of cell division illustrated. (ii) Give a reason for your answer in (a)(i) above (b)(i) Name the stage of cell division labeled K. (ii) Give a reason for your answer in (b) (i) above
27.
Describe the mode of reproduction in a named fungus
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