NEET Biology: Sexual Reproduction in Flowering Plants — Practice Set 15

Q1. Which of the following correctly describes the female reproductive structure of a flower?

A. Stigma, style, and anther
B. Stigma, style, and ovary
C. Petal, sepal, and filament
D. Sepal, petal, and anther

Q2. Which of the following statements about the role of phytochrome in flowering induction is correct?

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

Q3. Which statement best explains the function of the endosperm in flowering plants?

A. It becomes the seed coat
B. It provides nutrition to the developing embryo
C. It develops into the fruit
D. It forms the male gametophyte

Q4. During microsporogenesis, the microspore mother cell undergoes meiosis to produce how many microspores?

A. 1
B. 2
C. 3
D. 4

Q5. Which of the following statements about the formation of the pollen exine is correct?

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

Q6. Which of the following statements about fruit development is correct?

A. The ovary develops into the fruit after fertilization.
B. The petals develop into the fruit.
C. The stamen develops into the fruit.
D. The pollen grain develops into the fruit.

Q7. Which of the following statements about the evolutionary advantage of sexual reproduction is correct?

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

Q8. In flowering plants, pollination is defined as:

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

Q9. Which of the following statements regarding the role of phytohormones in flowering is correct?

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

Q10. An endospermic seed is one in which:

A. The endosperm is completely consumed during embryogenesis
B. The endosperm persists as a food reserve in the mature seed
C. No endosperm is formed during double fertilization
D. The embryo is larger than the endosperm

Biology — Sexual Reproduction in Flowering Plants

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