Egg apparatus consists of

1

(a)

egg

(b)

egg and polar nuclei

(c)

Egg and synergids

(d)

Egg and antipodal cells

In angiosperms, pollen tubes liberate their male gametes into the

1

(a)

Central cell

(b)

Antipodal cell

(c)

Egg cell

(d)

Synergids

Insect-pollinated flowers are characterized by

1

(a)

Large number of pollens

(b)

Dry and smooth pollens

(c)

Sticky and rough pollens

(d)

Heavy pollens

In a flowering plant, archesporium gives rise to

1

(a)

only the wall of the sporangium

(b)

both wall and the sporogenous cells

(c)

wall and the tapetum

(d)

Only tapetum and sporogenous cells

An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is

1

(a)

Campylotropous

(b)

Anatropous

(c)

Orthotropous

(d)

Hemitropous

The pollen tube usually enters the embryo sac

1

(a)

Through one of the synergids

(b)

By directly penetrating the egg

(c)

Between one synergid and central cell

(d)

By knocking off the antipodal cells

Through which cell of the embryo sac, does the pollen tube enter the embryo sac?

1

(a)

Egg cell

(b)

Persistent synergid

(c)

Degenerated synergid

(d)

Central Cell

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

1

(a)

Amphitropous

(b)

Circinotropous

(c)

Atropous

(d)

Anatropous

In some plants anthers and stigma grow and mature at the same time.This phenomenon is called

1

(a)

Homogamy

(b)

Sanamy

(c)

Allogamy

(d)

Fusion

Which one of the following is surrounded by a callose wall?

1

(a)

Male gamete

(b)

Egg

(c)

Pollen grain

(d)

Microspore mother cell

How many microsporangia are present in a typical anther of an angiosperm?

2

(a)

Four

How do flowers of Vallisneria get pollinated?

2

(a)

Vallisneria shows true hydrophily, i.e. pollination by water

Pea flowers produce assured seed sets. Given a reason.

2

(a)

Pea flowers are autogamous as their anthers and stigma lie close to each other; they are also cleistogamous. When the anthers dehisce, the pollen grains fall on the sigma and fertilisation is effected to produce seeds.

Why do the pollen grains of Vallisneria have a mucilaginous covering?

2

(a)

The pollen grains of Vallisneria are released into water; the mucilaginous covering protects them from wetting the consequent decay.

Why are non-albuminous seeds so-called?

2

(a)

Non-albuminous seeds have no residual endosperm, as it completely consumed during development of embryo.

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

2

(a)

One female gamete and two male synergids.

Name the protective substance present in the pollen envelope to tide over adverse conditions.

3

(a)

Sporopollenin.

Differentiate between : perisperm and pericarp

3

(a)

After fertilization, the wall of ovary is transformed into wall of fruit which is called pericarp. The ovule is transformed into seed, in which the nucellus some times remains persistent as perisperm. Thus, the perisperm lies below the testa and tegmen

Explain any two ways by wich apomictic seeds get developed.

3

(a)

What are the zoophily, zoophilous flowers and entomophilous flowers? List the characters of entomophilous flowers.

3

(a)

Define ornithophily, chiropterophily and malacophily.

3

(a)

Draw a traverse sectional view of an apple and label the following parts along with their technical names:
(i) Edible part
(ii) Enclose the embryo
(iii) Forms the fruit wall.

5

(a)

Observe the figure carefully and the answer of the following question:

(a) Write whether ovary is superior or superior or inferior?
(b) What is the type of flower - hypogynous, perigynous or epigynous?
(c) What type of ovule is shown the figure?
(d) What changes occur in C after fertilization?
(e) What does A,B,C,D represent in the figure.

5

(a)