Sexual Reproduction In Flowering Plants Chapter-Wise Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about fruit development is correct?

The ovary develops into the fruit after fertilization.
The petals develop into the fruit.
The stamen develops into the fruit.
The pollen grain develops into the fruit.
1

After fertilization, the ovary matures and develops into a fruit that encloses the seeds.

Which statement best explains the function of the endosperm in flowering plants?

It becomes the seed coat
It provides nutrition to the developing embryo
It develops into the fruit
It forms the male gametophyte
2

The endosperm serves as a nutritive tissue that sustains the developing embryo until the seed germinates.

In flowering plants, pollination is defined as:

The production of seeds without fertilization.
The transfer of pollen from anther to stigma.
The development of the embryo sac.
The process of seed dispersal.
2

Pollination is the transfer of pollen grains from the anther (male part) to the stigma (female part) of a flower.

During microsporogenesis, the microspore mother cell undergoes meiosis to produce how many microspores?

1
2
3
4
4

Meiosis in the microspore mother cell produces a tetrad of four haploid microspores.

An endospermic seed is one in which:

The endosperm is completely consumed during embryogenesis
The endosperm persists as a food reserve in the mature seed
No endosperm is formed during double fertilization
The embryo is larger than the endosperm
2

In endospermic seeds, the endosperm remains as a nutritive reserve in the mature seed, supporting early seedling growth.

Which of the following statements about the evolutionary advantage of sexual reproduction is correct?

Sexual reproduction, through mechanisms such as crossing over and fusion of gametes, increases genetic diversity, enhancing adaptability to environmental changes.
Sexual reproduction always produces genetically identical offspring.
Sexual reproduction has no evolutionary benefit compared to asexual reproduction.
Sexual reproduction limits natural selection.
1

By generating genetic diversity, sexual reproduction increases the potential for natural selection and enhances the adaptability of plant populations.

Which of the following statements about the role of phytochrome in flowering induction is correct?

Phytochrome mediates the plant's response to day length, influencing flowering time under different photoperiods.
Phytochrome directly synthesizes florigen.
Phytochrome has no effect on the timing of flowering.
Phytochrome only affects seed germination and not flowering.
1

Phytochrome is a photoreceptor that plays a crucial role in photoperiodism, thereby influencing the induction of flowering in response to day length.

Which of the following statements about the formation of the pollen exine is correct?

The pollen exine is formed by the deposition of sporopollenin during pollen development.
The pollen exine is derived from the tapetum through cell fusion.
The pollen exine is composed mainly of cellulose and pectin.
The pollen exine forms only after the pollen reaches the stigma.
1

The exine is the highly resistant outer wall of the pollen grain, primarily composed of sporopollenin deposited during pollen development.

Which of the following correctly describes the female reproductive structure of a flower?

Stigma, style, and anther
Stigma, style, and ovary
Petal, sepal, and filament
Sepal, petal, and anther
2

The female part of a flower (the carpel or pistil) comprises the stigma, style, and ovary, where the ovules are located.

Which of the following statements regarding the role of phytohormones in flowering is correct?

Auxin plays a key role in fruit development and seed formation.
Gibberellins completely inhibit the process of flowering.
Cytokinins are solely responsible for inhibiting fruit set.
Abscisic acid promotes immediate seed germination.
1

Auxin is involved in various reproductive processes, including fruit set and development, by stimulating cell division and expansion.

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