Biology
The figure shown below represents a process in flowers. Study the same and answer the following questions.
(a) Name and define the process.
(b) Write the technical term of the above mentioned process.
(c) Give two examples of plants in which this process occurs.
(d) Write one advantage and one disadvantage of the process shown.
(e) Name two agents that participate in this process.
Pollination
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Answer
(a) The process is Cross-Pollination. It is defined as the transfer of pollen grains from the anthers of one flower to stigma of another flower of a different plant of the same species.
(b) Allogamy
(c) Oxalis, Hibiscus
(d) Advantage — The offsprings are healthier and can adapt to environmental changes.
Disadvantage — The pollination is not always certain because some pollinating agent is always needed which may or may not be available at the proper time.
(e) Insects, Wind
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Related Questions
Describe the advantages and disadvantages of cross-pollination to the plant.
What is the function of the pollen tube? Explain it with the help of a diagram.
Given alongside is a diagrammatic sketch of the sectional view of a germinating pollen grain. Study the same and then answer the questions that follow:
(a) Name the parts labelled 1, 2, 3, 4 and 5.
(b) Where does the germination of the pollen grain take place and how?
(c) What is the function of the part labelled '4'?
(d) What happens to the part labelled '5' during the process?
Given below is a diagrammatic representation of the process of fertilization. Study the same and then answer the questions that follow:
(a) Name the parts labelled 1, 2, 3, 4, 5 and 6.
(b) What happens to (i) Ovary (ii) Ovule after fertilization?
(c) What is the function of the synergids?
(d) What part does the stigma play in the process of fertilization?
