Post Fertilization

Q. After fertilization, the ovule develops into the _______ and ovary develops into the _______.

1. embryo, seed
2. seed, embryo
3. seed, fruit
4. fruit, seed

Q. What is the genetic nature of apomictic embryos?Can they be called Clones?

Q. After fertilization, which part of the flower remains attached to the plant ?

1. Stamen
2. Ovary
3. Petals
4. Sepals

Q.

Which part of the flower turns into fruit?

Q.

What are the function of first and second polar body?

Q. The number of chromosomes present in each cell of embryo is 48, then the number of chromosomes present in the zygote of that organism is _______.

1. 12
2. 24
3. 48
4. 56

Q. After fertilization in flowering plants, the ovary develops into the fruit and it forms a thick wall called _____________.

1. seed
2. integument
3. pericarp
4. none of the above

Q.

Embryogenesis involves

1. Cell differentiation

2. Cell division

3. Both a & b

4. None

Q. Cleavage is

1. meiosis of zygote into blastomeres
2. mitosis of the zygote into blastomere
3. reductional division of zygote
4. reductional division of the embryo

Q.

Identify the correct sequence of events in sexual reproduction.

1. Syngamy
2. Zygote formation
3. Gametogenesis
4. Embryogenesis
5. Gamete transfer

Q. The number of chromosomes present in each cell of embryo is 48, then the number of chromosomes present in the zygote of that organism is _______.

1. 12
2. 24
3. 56
4. 48

Q.

The most vital event of sexual reproduction is -

1. Gamete formation

2. Gamete development

3. Gametic fusion

4. Gamete transfer

Q. Arrange the following in order of their occurrence in plants

1. Syngamy , pollination, embryogenesis, fertilization
2. Fertilization, pollination, syngamy, embryogenesis
3. Pollination, syngamy, embryogenesis
4. Pollination, embryogenesis, fertilization, syngamy

Q. How many sperm and ova will be produced from 25 primary spermatocytes and 25 primary oocytes respectively?

1. 100 sperm and 50 ova
2. 50 sperm and 25 ova
3. 100 sperm and 25 ova
4. 100 sperm and 100 ova

Q. Sexual Reproduction can be divided into ________ distinct stages.

1. Two
2. Three
3. Four
4. Five

Q.

Post-fertilisation events occur after the formation of zygote, and is collectively termed -

1. Gametogenesis

2. Fertilization

3. Embryogenesis

4. None of the above

Q. Sexual Reproduction can be divided into ________ distinct stages.

1. Two
2. Three
3. Four
4. Five

Q.

Embryogenesis occurs post-fertilisation.

1. True

2. False

Q.

Does the sperm fuses with the ovum or the secondary oocyte?Because only after the entry of sperm secondary oocyte undergoes meiosis II and form ovum and 2nd polar body.

Q. Cleavage is

1. meiosis of zygote into blastomeres
2. mitosis of the zygote into blastomere
3. reductional division of zygote
4. reductional division of the embryo

Q. After fertilization, the ovule develops into the _______ and ovary develops into the _______.

1. embryo, seed
2. seed, embryo
3. seed, fruit
4. fruit, seed

Q. The number of nuclei present in a zygote is
(a) None
(b) One
(c) Two
(d) Four

Q. Clumping of cells leads to lesser availability of nutrients and oxygen to the cells in the bioreactor.

1. True
2. False

Q. Embryo sac is monosporic when it develops from ?

1. One of the four megaspores of a megaspore mother cell
2. Three megaspores of a megaspore tetrad
3. Two functional megaspores
4. The megaspore mother cell where meiosis has occurred but cytokinesis does not take place

Q. Name the component cells of the 'egg apparatus' in an embryo sac.

Q. Mention part A and B, labelled in the figure:

1. Radical, primary root
2. Epicotyl, radical
3. Hypocotyl, primary root
4. Epicotyl, primary root

Q. The egg apparatus of angiosperms comprises

1. an egg cell and two antipodals
2. an egg cell and two synergids
3. an egg cell and the central cell.
4. an egg cell and two polar nuclei

Q. After fertilization, which part of the flower remains attached to the plant ?

1. Stamen
2. Sepals
3. Ovary
4. Petals

Q. Which one of the following is not a property of cancerous cells?

1. They compete with normal cells for vital nutrients.
2. They show contact inhibition.
3. They do not remain confined in the area of formation.
4. They divide in an uncontrolled manner.

Q. Mention part A and B, labelled in the figure:

1. Radical, primary root
2. Epicotyl, radical
3. Hypocotyl, primary root
4. Epicotyl, primary root