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JKCET Sexual Reproduction in Flowering Plants — practice questions

Explore 45 free Sexual Reproduction in Flowering Plants questions in JKCET 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 1–30 of 45.

A typical angiosperm anther is:Read the answer and worked solution →After microsporogenesis, the cells of the resulting microspore tetrad have a ploidy of:Read the answer and worked solution →The hard outer wall of a pollen grain is made up of:Read the answer and worked solution →The inner wall of a pollen grain, the *intine*, is composed of:Read the answer and worked solution →The germ pores in a pollen grain are regions where:Read the answer and worked solution →In a mature 2-celled pollen grain at the time of shedding, the two cells present are:Read the answer and worked solution →Approximately what percentage of angiosperms shed pollen at the 2-celled stage?Read the answer and worked solution →The three parts of a typical pistil are:Read the answer and worked solution →In a typical angiosperm ovule, the small opening in the integuments through which the pollen tube usually enters is the:Read the answer and worked solution →A mature angiosperm embryo sac is typically:Read the answer and worked solution →The three cells at the chalazal end of an embryo sac are called:Read the answer and worked solution →The large central cell of the embryo sac contains how many polar nuclei?Read the answer and worked solution →Transfer of pollen grains from the anther to the stigma of the **same flower** is called:Read the answer and worked solution →Which of the following is the **only** type of pollination that brings genetically different pollen grains to the stigma?Read the answer and worked solution →Wind-pollinated flowers typically have all of the following features EXCEPT:Read the answer and worked solution →Production of unisexual flowers on different plants (each plant either male or female) is called:Read the answer and worked solution →In a plant breeding programme, removal of anthers from a flower bud before dehiscence is called:Read the answer and worked solution →Bagging in plant breeding is done to:Read the answer and worked solution →The ploidy of the primary endosperm nucleus (PEN) in angiosperms is:Read the answer and worked solution →After double fertilisation, the zygote develops into the embryo while the:Read the answer and worked solution →Coconut water (the liquid inside a tender coconut) is best described as:Read the answer and worked solution →Triple fusion takes place in:Read the answer and worked solution →In a dicot embryo, the portion of the embryonal axis above the level of cotyledons is the:Read the answer and worked solution →In a monocot (grass) embryo, the cotyledon is called the:Read the answer and worked solution →The protective sheath that encloses the plumule in a grass embryo is the:Read the answer and worked solution →In some seeds (e.g., black pepper, beet), a persistent remnant of the nucellus is retained. This residual tissue is called the:Read the answer and worked solution →As the ovary develops into a fruit, the ovary wall becomes the:Read the answer and worked solution →Parthenocarpic fruits develop:Read the answer and worked solution →Polyembryony refers to:Read the answer and worked solution →Pollen grains can be stored for years in:Read the answer and worked solution →

Worked practice questions

A typical angiosperm anther is:

  1. Dithecous and bilobed
  2. Unilobed and asporangiate
  3. Monothecous and bilobed
  4. Trithecous and trilobed
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Correct answer: A. Dithecous and bilobed

A typical angiosperm anther is **bilobed and dithecous** (each lobe has two theca). The anther is tetragonal with four microsporangia (two per lobe).

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After microsporogenesis, the cells of the resulting microspore tetrad have a ploidy of:

  1. Diploid (2n)
  2. Haploid (n)
  3. Tetraploid (4n)
  4. Triploid (3n)
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Correct answer: B. Haploid (n)

Meiosis halves the chromosome number: PMC (2n) → tetrad of four **haploid (n)** microspores.

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The hard outer wall of a pollen grain is made up of:

  1. Pectin
  2. Cellulose
  3. Sporopollenin
  4. Lignin
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Correct answer: C. Sporopollenin

The pollen **exine** is made of **sporopollenin** — one of the most resistant organic materials known, withstanding high temperatures, strong acids/alkalis, and no enzyme degrades it.

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