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PUCET (Punjab) Sexual Reproduction in Flowering Plants — practice questions — page 2

Explore 45 free Sexual Reproduction in Flowering Plants questions in PUCET (Punjab) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Sexual Reproduction in Flowering Plants questions and exercises with answers

Showing questions 31–45 of 45.

Worked practice questions

Male reproductive part of a flower is:

  1. Sepal
  2. Stamen (filament + anther; anther contains pollen sacs)
  3. Petal
  4. Carpel
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Correct answer: B. Stamen (filament + anther; anther contains pollen sacs)

Stamen = filament (stalk) + anther (sac structure with 4 pollen sacs/microsporangia). Pollen produced inside anther. Collective: androecium. **Number/arrangement:** free, fused, etc. — taxonomically important.

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Pollination is the transfer of pollen from:

  1. Ovary → ovule
  2. No transfer needed
  3. Anther → stigma - of same or different flower
  4. Stigma → anther
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Correct answer: C. Anther → stigma - of same or different flower

**Pollination:** pollen transfer from anther to stigma. **Self-pollination:** within same flower (autogamy) or between flowers of same plant (geitonogamy). **Cross-pollination (xenogamy):** between different plants of same species. Pre-fertilization event. Compare with fertilization (gamete fusion).

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Endosperm of flowering plants is:

  1. Triploid (3n) — formed from 2 polar nuclei + 1 sperm
  2. Diploid (2n)
  3. Hexaploid
  4. Haploid
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Correct answer: A. Triploid (3n) — formed from 2 polar nuclei + 1 sperm

**Endosperm:** 3n (triploid) — formed by triple fusion. Stores nutrients for embryo. Persists in mature seed (e.g., cereals, castor) or consumed during embryo development (e.g., pea, mustard — store food in cotyledons instead). Important food source (rice, wheat — endosperm).

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