Select the correct order of endosperm types

1

(a)

cellular, helobial, free nuclear

(b)

cellular, free nuclear, helobial

(c)

helobial, free nuclear, cellular

(d)

free nuclear, cellular, helobial

(e)

free nuclear, helobial, cellular

From among the sets of terms given below, identify those that are associated with gynoecium.

1

(a)

Stigma, ovule, embryo sac, placenta

(b)

Thalamus, pistil, style, ovule

(c)

Ovule, ovary, tapetum, embryo sac

(d)

Egg, integument, embryo sac, nucellus

The outermost and innermost wall layers of microsporangium in an anther are respectively

1

(a)

Endothecium and tapetum

(b)

Epidermis and endodermis

(c)

Epidermis and middle layers

(d)

Epidermis and tapetum

From the statements given below choose the option that is true for a typical female gametophyte of a flowering plant:
i) It is 8-nucleate and 7-celled at maturity
ii) It is free nuclear during development
iii) It is situated inside the integument but outside the nucellus
iv) It has an egg apparatus situated at the chalazal end.

1

(a)

i) and iv)

(b)

ii) and iii)

(c)

i) and ii)

(d)

ii) and iv)

In a flower, if a megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be

1

(a)

Haploid

(b)

Diploid

(c)

A few haploid and a few diploid

While planning for an artificial hybridization programme involving dioecious plants, which of the following steps will be irrelevent:

1

(a)

Bagging of female flower

(b)

Dusting of pollen on stigma

(c)

Emasculation

(d)

Collection of pollen

Autogamy can occur in a chasmogamous flower if

1

(a)

Pollen matures before maturity of ovule.

(b)

Ovules mature before maturity of pollen.

(c)

Both pollen and ovules mature simultaneously.

(d)

Both anther and stigma are of equal lengths.

From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

1

(a)

Monoecious plant bearing unisexual flowers.

(b)

Dioecious plant bearing only male or female flowers.

(c)

Monoecious plant with bisexual flowers.

(d)

Dioecious plant with bisexual flowers.

In a fertilised embryo sac, the haploid, diploid and triploid structures are:

1

(a)

Synergid, zygote and primary endosperm nucleus.

(b)

Synergid, antipodal and polar nuclei.

(c)

Antipodal, synergid and primary endosperm nucleus.

(d)

Synergid, polar nuclei and zygote

In an embryo sac, the cells that degenerate after fertilisation are

1

(a)

Synergids and primary endosperm cell.

(b)

Synergids and antipodals

(c)

Antipodals and primary endosperm cell.

(d)

Egg and antipodals.