Consider the following statements.1. Fertilisation of the egg takes place inside the embryo sac.2. Fertilised ovum form the embryo.3. Endosperm is generally triploid.Which of the statements given above are correct?

Consider the following statements.<br>1. Fertilisation of the egg takes place inside the embryo sac.<br>2. Fertilised ovum form the embryo.<br>3. Endosperm is generally triploid.<br>Which of the statements given above are correct?

Which of the following statements is/are true in the context of fertilisation and pollination in plants. A. Ovary of the flower matures into fruit. B. Seeds of the plant forms the ovules for fertilisation. C. Pollination takes place after fertilisation. D. In pollination, seeds are dispersed by wind, water, birds and insects. E. Fertilisation takes places in the ovules.

A

A, E

B

B, C

C

C, D

D

B, E

Consider the following statements regarding Xenia and choose the correct answer:
1. If a white variety (yy) is pollinated with pollen from a yellow variety (YY), one of the male gametes (Y) will unite with the egg (y) to produce a hybrid embryo (Yy) which will act as a heterozygote for yellow endosperm in the next generation
2. The second male gamete (Y) will unite with the two polar nuclei (y, y) and produces the primary endosperm nucleus (Yyy) which is triploid
3. If a yellow endosperm variety (YY) is crossed with pollen from a white grained variety, the grains produced are white like the pollen parent

A

Only 1 and 2 are true

B

Only 2 and 3 are true

C

Only 1 and 3 are true

D

1, 2 and 3 are true

Consider the following statements regarding recurrent type apomixis and choose the correct answer:
1. There is meiosis during the formation of megaspore
2. The embryo sac is diploid in nature
3. The embryo sac never develops from a cell of the archesporium
4. The development of embryo from a cell of an embryo sac other than egg is known as apospory

A

Only 1, 2 and 3 are true

B

Only 1 and 4 are true

C

Only 2, 3 and 4 are true

D

Only 2 and 4 are true

Which of the following statements is/are correct? 1. In Intracytoplasmic sperm injection method ova from the wife/donor (female) and sperms from the husband/donor (male) are collected and are induced to form zygote under simulated conditions in the laboratory. 2. In vitro fertilisation is a specialised procedure to form an embryo in the laboratory in which a sperm is directly injected into the ovum.

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

Consider the following statements and choose the correct answer:
1. In Oenothera type of monosporic embryo sac, the embryo develops from the micropylar megaspore of the tetrad
2. Antipodal cells are altogether absent in Oenothera type
3. The genus Trapa forms an 8-nucleate embryo sac of the Polygonurn type
4. Oenothera type of embryo sac development has been found to be a characteristic feature of the entire family Onagraceae

A

Only 1, 2 and 3 are true

B

Only 2, 3 and 4 are true

C

Only 1, 2 and 4 are true

D

1, 2, 3 and 4 are true

Which of the following statements refers to the process of 'parthenogenesis'? 1. It is a natural form of asexual reproduction in which the growth and development of embryos occur without fertilisation. 2. It is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. 3. It is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg inside of the female's body Select the correct answer using the codes given below.

A

Only 1

B

Only 1 and 2

C

Only 3

D

Only 2

Consider the following statements regarding double fertilization and choose the correct answer:
1. At the time of the sperm's approach to the egg nucleus, the male nucleus has the appearance of a continuous thread rolled into a ball
2. It is only the presence of the two nucleoli which serves to distinguish the fertilized egg from the unfertilized egg
3. Finally, the male nucleolus increases in size and fuses with the female nucleolus thus closing the phenomenon of sexual union of the nuclei
4. The fusion of the male gamete with the secondary nucleus results in the formation of a sister embryo

A

Only 1, 2 and 3 are true

B

Only 2, 3 and 4 are true

C

Only 1, 3 and 4 are true

D

Only 1, 2 and 4 are true

Consider the following statements.
1. When evaporation takes place, cooling takes place.
2. Evaporation takes place at all temperature, boiling takes place only at the boiling point.
3. Evaporation is a surface phenomenon.
Which of the statements given above is/are true?

A

Only 1

B

1 and 2

C

2 and 3

D

1, 2 and 3

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: Somatic embryogenesis in plants is a twostep process comprising of embryo initiation followed by embryo production.
Reason: Embryo initiation is independent of the presence of 2, 4-dichlorophenoxyacetic acid, whereas embryo production requires a high concentration of 2, 4-dichlorophenoxyacetic acid.

A

Both (A) and (R) are true and (R) is the correct reason for (A)

B

Both (A) and (R) are true and (R) is not the correct reason for (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Consider the following statements regarding poloyembryony and choose the correct answer:
1. False polyembryony includes the development of two or more embryo sacs within the Same nucellus, and the embryos are derived from different embryo sacs
2. In cleavage polyembryony, the zygote instead of giving rise to one embryo produces embryos by cleavage
3. According to Jeffrey (1895), in Erythronium americanum the "embryogenic mass" forms two or three embryos

A

Only 1 and 2 are true

B

Only 2 and 3 are true

C

Only 3 is true

D

1, 2 and 3 are true

Consider the following statements.
1. Fertilisation of the egg takes place inside the embryo sac.
2. Fertilised ovum form the embryo.
3. Endosperm is generally triploid.
Which of the statements given above are correct?

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