The type of apomixis, where the embryo sac develops from any cell of the archesporium is known as

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

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

The method by which embryo sac is formed from archesporium without meiosis is called

A

Adventive embryony

B

Diplospory

C

Somatic apospory

D

Generative apospory

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.
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?

A

1, 2 and 3

B

1 and 2

C

2 and 3

D

1 and 3

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

Embryonic stem cells (ES) are isolated and are injected again into the blastocoel of a developing embryo. The embryo which develops is entirely made up of these cells only.

A

True

B

False

Which is the largest cell of the embryo sac?

A

Chlazal cells

B

Micropylar cells

C

Synergids

D

Central cell

During embryo development the hypobasal cell and the remaining cells of the embryo (except proembryo) constitute the

A

Suspensor

B

Perisperm

C

Cotyledon

D

None of the above

Consider the following statements:
1. Parliament shall, while a proclamation of Emergency is in operation, have the power to make laws of the whole or any part of territory of India with respect to any of the matters enumerated in the list
2. Parliament has exclusive power to make any law with respect to any matter not enumerated in the Concurrent List or State List
3. Parliament has power to make any law for the whole or any part of the territory of India for implementing any treaty, agreement, or convention with any other country
4. Parliament has power to legislate with respect to a matter in the State List in the national interest subject to the resolution passed by the Council of States by two-thirds majority
Which of these statements are correct?

A

1, 2 and 3

B

1, 2, 3, and 4

C

1, 3 and 4

D

2 and 4