Class 12 Biology MCQ Chapter 2 Sexual Reproduction in Flowering Plants
Strengthen your Biology preparation with our Class 12 Biology MCQ Chapter 2 Sexual Reproduction in Flowering Plants English Medium question bank. This article contains a comprehensive collection of multiple-choice questions (MCQs) with answers, specially prepared for AHSEC Higher Secondary students to help them excel in examinations.
The chapter Sexual Reproduction in Flowering Plants explains the fascinating process through which flowering plants reproduce and ensure the continuation of their species. Students will learn about flower structure, microsporogenesis, megasporogenesis, pollination, fertilization, embryo development, seed formation, fruit development, and double fertilization. These topics are fundamental to plant biology and are frequently asked in AHSEC board examinations.
Our MCQs are designed according to the latest AHSEC syllabus and examination pattern, ensuring students get access to relevant and exam-focused practice questions. Regular practice of these objective questions will improve conceptual understanding, strengthen revision, and help students perform better in both school and board examinations.
Whether you are revising important topics or preparing for the AHSEC Higher Secondary Final Examination, these Chapter 2 MCQ solutions will provide the practice and confidence needed to achieve excellent results in Biology.
Unit VI: Reproduction
Sexual Reproduction in Flowering Plants
VSA & MCQ
I. Very Short Question-Answers
Q. What is the male reproductive organ of a flower?
Ans: Stamen.
Q. What is the female reproductive organ of a flower?
Ans: Pistil or carpel.
Q. Name the parts of a stamen.
Ans: Anther and filament.
Q. What are microsporangia?
Ans: Microsporangia are structures in the anther where pollen grains are produced.
Q. What is pollen grain?
Ans: Pollen grain is the male gametophyte of flowering plants.
Q. What is the outer wall layer of pollen grain called?
Ans: Exine.
Q. Which substance forms the exine of pollen grain?
Ans: Sporopollenin.
Q. What is germ pore?
Ans: Germ pore is the aperture in the exine through which the pollen tube emerges.
Q. What is the female gametophyte in angiosperms?
Ans: Embryo sac.
Q. Where is the embryo sac located?
Ans: Inside the ovule.
Q. What is an ovule?
Ans: Ovule is the structure that develops into a seed after fertilization.
Q. Name the opening present in the ovule.
Ans: Micropyle.
Q. How many nuclei are present in a mature embryo sac?
Ans: Eight nuclei.
Q. How many cells are present in a mature embryo sac?
Ans: Seven cells.
Q. What is pollination?
Ans: Pollination is the transfer of pollen grains from anther to stigma.
Q. What is self-pollination?
Ans: Transfer of pollen grains from anther to stigma of the same flower or plant.
Q. What is cross-pollination?
Ans: Transfer of pollen grains from one plant to the stigma of another plant.
Q. Name one agent of pollination.
Ans: Wind.
Q. What is pollen-pistil interaction?
Ans: It is the interaction between pollen grain and pistil during pollination.
Q. What is pollen tube?
Ans: Pollen tube is the tubular structure formed by a germinating pollen grain.
Q. What is syngamy?
Ans: Syngamy is the fusion of male gamete with egg cell.
Q. What is triple fusion?
Ans: Triple fusion is the fusion of one male gamete with two polar nuclei.
Q. What is double fertilization?
Ans: Double fertilization is the occurrence of syngamy and triple fusion in the same embryo sac.
Q. What is primary endosperm nucleus (PEN)?
Ans: PEN is formed by triple fusion.
Q. What develops from the zygote?
Ans: Embryo.
Q. What develops from the ovule after fertilization?
Ans: Seed.
Q. What develops from the ovary after fertilization?
Ans: Fruit.
Q. What is apomixis?
Ans: Apomixis is seed formation without fertilization.
Q. What is polyembryony?
Ans: Polyembryony is the occurrence of more than one embryo in a seed.
Q. Name one plant showing polyembryony.
Ans: Citrus.
II. Multiple Choice Questions (MCQs)
Q. The male reproductive part of a flower is:
(a) Pistil
(b) Ovary
(c) Stamen
(d) Ovule
Ans: (c) Stamen
Q. Pollen grains are produced in:
(a) Ovary
(b) Stigma
(c) Filament
(d) Anther
Ans: (d) Anther
Q. The outer wall of pollen grain is called:
(a) Intine
(b) Exine
(c) Nucellus
(d) Tapetum
Ans: (b) Exine
Q. Sporopollenin is present in:
(a) Intine
(b) Ovule
(c) Exine
(d) Embryo sac
Ans: (c) Exine
Q. The female gametophyte is:
(a) Pollen grain
(b) Ovary
(c) Embryo
(d) Embryo sac
Ans: (d) Embryo sac
Q. A mature embryo sac is typically:
(a) 8-celled and 7-nucleate
(b) 7-celled and 8-nucleate
(c) 8-celled and 8-nucleate
(d) 7-celled and 7-nucleate
Ans: (b) 7-celled and 8-nucleate
Q. The opening in the ovule is called:
(a) Chalaza
(b) Hilum
(c) Micropyle
(d) Funicle
Ans: (c) Micropyle
Q. Transfer of pollen grains from anther to stigma is called:
(a) Fertilization
(b) Germination
(c) Pollination
(d) Syngamy
Ans: (c) Pollination
Q. Pollination by wind is called:
(a) Entomophily
(b) Hydrophily
(c) Anemophily
(d) Zoophily
Ans: (c) Anemophily
Q. Pollination by insects is called:
(a) Entomophily
(b) Hydrophily
(c) Anemophily
(d) Ornithophily
Ans: (a) Entomophily
Q. The receptive part of pistil is:
(a) Ovule
(b) Style
(c) Ovary
(d) Stigma
Ans: (d) Stigma
Q. Double fertilization is characteristic of:
(a) Gymnosperms
(b) Algae
(c) Angiosperms
(d) Bryophytes
Ans: (c) Angiosperms
Q. Fusion of male gamete with egg is called:
(a) Triple fusion
(b) Pollination
(c) Syngamy
(d) Apomixis
Ans: (c) Syngamy
Q. Triple fusion results in formation of:
(a) Zygote
(b) Endosperm nucleus
(c) Embryo
(d) Ovule
Ans: (b) Endosperm nucleus
Q. The zygote develops into:
(a) Endosperm
(b) Fruit
(c) Seed coat
(d) Embryo
Ans: (d) Embryo
Q. Ovule develops into:
(a) Fruit
(b) Flower
(c) Seed
(d) Endosperm
Ans: (c) Seed
Q. Ovary develops into:
(a) Seed
(b) Fruit
(c) Embryo
(d) Cotyledon
Ans: (b) Fruit
Q. The nutritive tissue in seeds is:
(a) Embryo
(b) Cotyledon
(c) Endosperm
(d) Plumule
Ans: (c) Endosperm
Q. Formation of seeds without fertilization is called:
(a) Polyembryony
(b) Apomixis
(c) Syngamy
(d) Pollination
Ans: (b) Apomixis
Q. Occurrence of more than one embryo in a seed is called:
(a) Polyembryony
(b) Apomixis
(c) Fertilization
(d) Germination
Ans: (a) Polyembryony
Q. Citrus commonly shows:
(a) Fragmentation
(b) Polyembryony
(c) Budding
(d) Binary fission
Ans: (b) Polyembryony
Q. The innermost wall layer of anther is:
(a) Epidermis
(b) Endothecium
(c) Middle layers
(d) Tapetum
Ans: (d) Tapetum
Q. Tapetum provides nourishment to:
(a) Ovules
(b) Embryo sac
(c) Developing pollen grains
(d) Sepals
Ans: (c) Developing pollen grains
Q. The pollen tube enters the ovule through:
(a) Chalaza
(b) Funicle
(c) Micropyle
(d) Hilum
Ans: (c) Micropyle
Q. The egg apparatus consists of:
(a) Two synergids and one egg cell
(b) Three antipodals
(c) Two polar nuclei
(d) One egg cell and one synergid
Ans: (a) Two synergids and one egg cell
Q. The fusion of one male gamete with two polar nuclei is:
(a) Syngamy
(b) Pollination
(c) Triple fusion
(d) Germination
Ans: (c) Triple fusion
Q. Which of the following is not an agent of pollination?
(a) Wind
(b) Water
(c) Insects
(d) Roots
Ans: (d) Roots
Q. The transfer of pollen from one flower to another flower of the same plant is:
(a) Xenogamy
(b) Autogamy
(c) Geitonogamy
(d) Hybridization
Ans: (c) Geitonogamy
Q. Male gametes in flowering plants are carried by:
(a) Ovule
(b) Pollen tube
(c) Stigma
(d) Endosperm
Ans: (b) Pollen tube
Q. The structure connecting ovule to placenta is:
(a) Hilum
(b) Micropyle
(c) Funicle
(d) Chalaza
Ans: (c) Funicle
Q. Assertion (A): Double fertilization is unique to angiosperms.
Reason (R): It involves syngamy and triple fusion.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (b)
Q. Assertion (A): Pollen grains are produced in the ovary.
Reason (R): Ovary is the female reproductive part of flower.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (d)
Q. Assertion (A): Sporopollenin is highly resistant.
Reason (R): It protects pollen grains from adverse conditions.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Q. Assertion (A): Syngamy forms the primary endosperm nucleus.
Reason (R): Triple fusion forms the primary endosperm nucleus.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (c)
Q. Assertion (A): Apomixis results in seed formation without fertilization.
Reason (R): Apomixis prevents formation of embryos.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (c)
Q. Assertion (A): Tapetum nourishes developing pollen grains.
Reason (R): Tapetum is the innermost layer of anther wall.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (b)
Q. Assertion (A): Polyembryony is seen in Citrus.
Reason (R): Polyembryony means formation of many fruits from one flower.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (c)
