Sexual Reproduction in Flowering Plants NEET MCQ

Sexual reproduction in flowering plants involves the production of male and female gametes, fertilization and the development of seeds and fruits. The male reproductive part is the stamen, which consists of the anther and filament. The anther produces pollen grains that contain the male gametes. The female reproductive part is the pistil, which includes the stigma, style and ovary. The ovary contains ovules, each with a female gamete.

Pollination occurs when pollen from the anther is transferred to the stigma. This can happen through wind, water, insects or other animals. Once on the stigma, pollen grains germinate and form pollen tubes that grow down the style to reach the ovary. Fertilization occurs when the male gamete fuses with the female gamete in the ovule, forming a zygote. The zygote develops into an embryo and the ovule becomes a seed. The ovary matures into a fruit, protecting the seeds and aiding in their dispersal.

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Sexual reproduction in flowering plants MCQs for NEET

Q1. Identify A to G in following figure and answer accordingly.

A) A - Ovary, B - Filament, C - Sepal, D - Petal, E - Style, F - Stigma, G - Anther

B) A - Sepal, B - Ovary, C - Petal, D - Filament, E - Anther, F - Stigma, G - Style

C) A - Ovary, B - Sepal, C - Filament, D - Petal, E - Anther, F - Stigma, G - Style

D) A - Petal, B - Anther, C - Stigma, D - Style, E - Filament, F - Sepal, G - Ovary

Answer. C

Q2. Find odd one out.

JIPMER 2019

A) Stamen

B) Stigma

C) Style

D) Ovary

Answer. A

Explanation: (a) Stamen is the odd one out among the other options. Stamen represents the male reproductive part of a flower, whereas stigma, style and ovary, are the parts of a carpel or pistil which represents the female reproductive part of a flower.

Q3. Identify A to D in the following diagram.

A) A - Filament (stalk), B - Pollen sac, C - Pollen grain, D - Line of dehiscence

B) A - Filament (stalk), B - Pollen sac, C - Line of dehiscence, D-Pollen grain

C) A - Line of dehiscence, B - Filament (stalk), C - Pollen sac, D - Pollen grains

D) A - Filament (stalk), B - Line of dehiscence, C - Pollen sac, D - Pollen grains

Answer. D

Q4. The terminal structure of stamen is called

A) pollen

B) filament

C) anther

D) All of these

Answer. C

Explanation: (c) The terminal structure of stamen is called anther, which contains pollen grains (male gametophyte). Pollen grains are haploid in nature.

Q5. Number of microsporangia in an angiospermic anther is

A) 1

B) 2

C) 3

D) 4

Answer. D

Explanation: (d) A typical angiosperm anther is bilobed with each lobe having two theca. The anther is a four-sided (tetragonal) structure consisting of four microsporangia located at the corner with two in each theca.

Q6. Microsporangium develops into

A) pollens

B) microgametes

C) megagametes

D) pollen sac

Answer. D

Explanation: (d) Microsporangium develops further and becomes pollen sac. It is like a sac in which pollen develops. It is called pollen sac at the time of maturity.

Q7. The innermost layer of microsporangium is

A) tapetum

B) endothecium

C) middle layer

D) epidermis

Answer. A

Q8. Identify A to E in the following diagram.

A) A - Tapetum, B - Microspore mother cell, C - Middle layer, D - Endothecium, E - Epidermis

B) A - Epidermis, B - Middle layer, C - Microspore mother cell, D - Tapetum, E - Endothecium

C) A - Middle layer, B - Epidermis, C - Tapetum, D - Microspore mother cell, E - Endothecium

D) A - Epidermis, B - Endothecium, C - Middle layer, D - Mierospore mother cell, E - Tapetum

Answer. D

Q9.Centre of each microsporangium is occupied by

A) sporogenous tissue

B) tapetum

C) central tissue

D) microspore mother cell

Answer. A

Explanation: (a) Sporogenous tissue occupies the centre of each microsporangium. Each cell of this tissue is a potential pollen mother cell and can give rise to microspore tetrad.

Q10. The outermost wall layer of microsporangium in anther is

A) endothecium

B) tapetum

C) middle layer

D) epidermis

Answer. D

Explanation: (d) Microsporangium is surrounded by four wall layers. The outermost layer is epidermis which is followed by endothecium, the middle layer and the innermost layer called tapetum. The three outer layers of microsporangium perform the function of protection and help in dehiscence of anther to release pollen.

Q11. Which of the following perform microsporogenesis ?

A) Microspore mother cell

B) Pollen mother cell

C) Both (a) and (b)

D) None of these

Answer. C

Explanation: (c) Microspore mother cell and pollen mother cell are the same terms and form male gametes (pollens) by the process called microsporogenesis.

Q12. Dehiscence of anther in mesophytes is caused by

A) hydration of anthers

B) dehydration of anthers

C) mechanical injury

D) None of these

Answer. B

Explanation: (b) As the anthers of angiospermic mesophytic plants mature and dehydrate, the line of dehiscence ruptures releasing the microspores in atmosphere. These microspores dissociate from each other and develop into pollen grains.

Enhance your preparation with Arexiq’s Mock Test Series where we provide solutions to various MCQs like we provide in this post Sexual Reproduction in Flowering Plants NEET MCQ”. Our expert teachers explain the concepts thoroughly, making it easy for you to understand. We offer many types of questions ensuring a clear grasp of concepts.

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FAQs about Sexual Reproduction in Flowering Plants

Q1: What is sexual reproduction in flowering plants?
Answer: Sexual reproduction in flowering plants involves the fusion of male and female gametes to form a zygote, which eventually develops into a seed. This process includes pollination, fertilization, seed development and fruit formation.

Q2: What are the main parts involved in the sexual reproduction of flowering plants?
Answer: The main parts involved are the stamen (male reproductive organ) which consists of the anther and filament and the pistil (female reproductive organ) which includes the stigma, style and ovary.

Q3: What is pollination?
Answer: Pollination is the transfer of pollen grains from the anther (male part) to the stigma (female part) of a flower. It can be done by wind, water, insects or animals.

Q4: What is fertilization in flowering plants?
Answer: Fertilization in flowering plants is the process where the male gamete (sperm) from the pollen grain fuses with the female gamete (egg) in the ovule to form a zygote.

Q5: What is the role of the pollen tube?
Answer: The pollen tube grows from the pollen grain on the stigma down through the style to the ovary, allowing the male gametes to reach the ovule for fertilization.

Q6: What happens after fertilization?
Answer: After fertilization, the ovule develops into a seed and the ovary matures into a fruit, which protects the seed and aids in its dispersal.

Q7: What is double fertilization?
Answer: Double fertilization is a unique process in flowering plants where one sperm fertilizes the egg, forming a zygote, while the other sperm fuses with two polar nuclei to form the endosperm, which nourishes the developing embryo.

Q8: Why is the endosperm important?
Answer: The endosperm provides essential nutrients to the developing embryo, supporting its growth until it can perform photosynthesis on its own.

Q9: What are the types of pollination?
Answer: There are two main types of pollination: self-pollination (pollen from the same flower or plant) and cross-pollination (pollen from a different plant).

Q10: What are some adaptations of flowers for pollination?
Answer: Flowers have various adaptations for pollination, such as bright colors, sweet nectar, fragrances and specific shapes to attract pollinators like bees, butterflies, birds and bats.