Unit 3 Chapter 7: Reproduction in Plants - Sexual Reproduction in Flowering Plants — Online MCQ Test
BOTANY · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board
Practice Unit 3 Chapter 7: Reproduction in Plants - Sexual Reproduction in Flowering Plants with a free chapter-wise online MCQ test.
This chapter covers: This chapter details microsporogenesis megasporogenesis pollination pollen-pistil interactions double fertilization endosperm embryo development apomixis and polyembryony..
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Unit 3 Chapter 7: Reproduction in Plants - Sexual Reproduction in Flowering Plants — Important Questions & Answers
Microsporogenesis in flowering plants refers to the formation of ______.
- A. megaspore mother cells
- B. microspores from microspore mother cells
- C. pollen tube from pollen grain
- D. endosperm from primary endosperm nucleus
Answer: B. microspores from microspore mother cells
Microsporogenesis is the process by which microspore mother cells undergo meiosis to form haploid microspores, which later develop into pollen grains.
Microsporogenesis is the process by which microspore mother cells undergo meiosis to form haploid microspores, which later develop into pollen grains.
The structure that receives pollen grains during pollination is the ______.
- A. anther
- B. style
- C. stigma
- D. ovule
Answer: C. stigma
The stigma is the receptive surface of the pistil where pollen grains land and germinate.
The stigma is the receptive surface of the pistil where pollen grains land and germinate.
During megasporogenesis in most flowering plants, how many functional megaspores are usually formed from one megaspore mother cell?
- A. Four
- B. Three
- C. Two
- D. One
Answer: D. One
Typically, meiosis in the megaspore mother cell produces four megaspores, but only one remains functional in most angiosperms.
Typically, meiosis in the megaspore mother cell produces four megaspores, but only one remains functional in most angiosperms.
If the embryo sac has already received one male gamete and the second male gamete fails to fuse with the central cell, which process is directly affected?
- A. Microsporogenesis
- B. Formation of pollen wall
- C. Endosperm development
- D. Pollination
Answer: C. Endosperm development
The second male gamete is required for triple fusion and formation of the primary endosperm nucleus, which initiates endosperm development.
The second male gamete is required for triple fusion and formation of the primary endosperm nucleus, which initiates endosperm development.
A breeder wants to preserve hybrid vigor in the next generation without repeated crossing. Which phenomenon is most useful?
- A. Self-pollination
- B. Apomixis
- C. Meiosis in embryo sac
- D. Double fertilization
Answer: B. Apomixis
Apomixis allows seed formation without fertilization, helping maintain the exact hybrid genotype across generations.
Apomixis allows seed formation without fertilization, helping maintain the exact hybrid genotype across generations.