Section A: Multiple Choice Questions (1 mark each)
[Total: 5 marks]
- The functional megaspore develops from the megaspore mother cell through:
a) Mitosis
b) Meiosis
c) Endomitosis
d) Amitosis - The number of nuclei present in a typical mature female gametophyte of an angiosperm is:
a) 4
b) 6
c) 7
d) 8 - Which of the following is an example of autogamy?
a) Transfer of pollen to stigma of another flower on the same plant
b) Transfer of pollen to the stigma of the same flower
c) Transfer of pollen to the stigma of a flower on a different plant
d) None of these - Pollination by water is most commonly found in:
a) Maize
b) Vallisneria
c) Salvia
d) Hibiscus - Which of the following features is common in insect-pollinated flowers?
a) Light and dry pollen
b) Feathery stigma
c) Large, colourful petals
d) Lack of nectar
Section B: One-Word Answer Type (1 mark each)
[Total: 5 marks]
- What is the term for the process of formation of megaspores?
- Which type of pollination requires genetically different plants of the same species?
- Name one abiotic pollinating agent.
- What is the ploidy of the megaspore mother cell?
- Name one plant that shows pollination by bats.
Section C: Assertion and Reason (2 marks each)
[Total: 4 marks]
Assertion: Only one megaspore is functional in most angiosperms.
Reason: The remaining three degenerate after meiosis in the ovule.
Assertion: Wind-pollinated flowers usually lack fragrance and nectar.
Reason: Fragrance and nectar are essential for attracting wind as a pollinating agent.
Options:
a) Both Assertion and Reason are true, and Reason is the correct explanation.
b) Both Assertion and Reason are true, but Reason is not the correct explanation.
c) Assertion is true, but Reason is false.
d) Assertion is false, but Reason is true.
Section D: Short Answer Questions (3 marks each)
- Describe the development of the female gametophyte from a functional megaspore.
- Distinguish between autogamy, geitonogamy, and xenogamy.
Section E: Long Answer Question (5 marks)
- What are the different types of pollination? Describe the characteristics of flowers that promote anemophily and entomophily with suitable examples.
