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Test: Pre-Fertilisation Events (Old NCERT) - NEET MCQ


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10 Questions MCQ Test Biology Class 12 - Test: Pre-Fertilisation Events (Old NCERT)

Test: Pre-Fertilisation Events (Old NCERT) for NEET 2024 is part of Biology Class 12 preparation. The Test: Pre-Fertilisation Events (Old NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Pre-Fertilisation Events (Old NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Pre-Fertilisation Events (Old NCERT) below.
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Test: Pre-Fertilisation Events (Old NCERT) - Question 1

Which structure in the plant carries the male organ?

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 1
  • The pollen grains carry the male organ. Mostly the male organs are the motile gamete while the female organ is stationary.
  • It is necessary for the male organs to be small and light for easy propagation by the environmental agents.
Test: Pre-Fertilisation Events (Old NCERT) - Question 2

What are the cells in diploid organisms that undergo meiosis called?

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 2

Meiocytes are cells in diploid organisms that undergo meiosis. Meiosis is the process of producing 4 haploid cells from a single cell that has been divided twice. The haploid cell then becomes diploid after its fusion with the other sex gamete.

Test: Pre-Fertilisation Events (Old NCERT) - Question 3

Gametes in all ____ species are of 2 types.

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 3

All heterogametic species can produce 2 types of gametes, male and female, their sex chromosomes are unidentical. Homogametic species the sex chromosomes are identical.

Test: Pre-Fertilisation Events (Old NCERT) - Question 4

Which of the following is an example of a unisexual organism?

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 4
  • Cockroach is an example of a unisexual organism, which means it can produce only one type of gamete, either male or female.
  • Leech, tapeworm and earthworm are bisexual organisms, organisms that can produce both gametes.
Test: Pre-Fertilisation Events (Old NCERT) - Question 5

Cucurbits and coconuts are examples of:

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 5

A plant having both reproductive organs in the same plant is known as monoecious plants. It may also be known as homothallic conditions.
Dioecious plants are those which have only one reproductive organ, also known as unisexual plants. Another word for dioecious plants is heterothallic.

Test: Pre-Fertilisation Events (Old NCERT) - Question 6

What are the male organs in a flowering plant called?

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 6

Stamens are the male organs of a flower. Flowers maybe unisexual (either staminate or pistillate). In staminate plants only the male part, that is the stamen, is present and in the pistillate plants only the female part is present (ovaries). In bisexual plants, both are present.

Flower: Parts of a Flower, Importance, Example, Solved Questions

Test: Pre-Fertilisation Events (Old NCERT) - Question 7

The male gamete is called as ___________.

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 7

Male gamete is called antherozoid or sperm. They are called so in heterogametes. The two gametes produced are morphologically distinct types. The female gamete is called egg or ovum.

Test: Pre-Fertilisation Events (Old NCERT) - Question 8

What are the 2 main pre fertilization events?

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 8

Gametogenesis refers to the formation of the gametes. In sexual reproduction formation of gametes is very important since an offspring is formed only after the fusion of the gametes. Gamete transfer refers to bringing the 2 gametes together.

Test: Pre-Fertilisation Events (Old NCERT) - Question 9

What is the most important event in sexual reproduction?

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 9

Fertilization is the most important event in sexual reproduction. It is the process of fusion of 2 haploid gametes of different sex, forming one single diploid zygote. Also known as syngamy.

Test: Pre-Fertilisation Events (Old NCERT) - Question 10

What is syngamy?

Detailed Solution for Test: Pre-Fertilisation Events (Old NCERT) - Question 10

Syngamy is the process of fusion of a haploid male(n) and a haploid female(n) gamete. On fusion, the zygote or the egg formed is diploid(2n). Often this process is also known as fertilization.

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