The unit of reproductive structure used in vegetative propagation is called as __________________

(a)

Diplospores

(b)

Aplanospores

(c)

Diaspores

(d)

Conidiospores

Which of the following aquatic plant is popularly known as the "Terror of Bengal"?

(a)

Eichomia crassipes

(b)

Vallisneria spiralis

(c)

Pistia stratiotes

(d)

Zostera marina

The genetic ability of a plant cell to produce the entire plant is said to be ________________

(a)

Multipotency

(b)

Totipotency

(c)

Pleuripotency

(d)

Differentiation

A typical anther is ________________

(a)

Bisporangiate

(b)

Tetrasporangiate

(c)

Unisporangiate

(d)

Multisporangiate

Innermost layer of anther wall is ________________

(a)

Endothecium

(b)

Endothecum

(c)

Endothelium

(d)

Tapetum

Name the person who discovered the pollen tube?

(a)

E. Strasburger

(b)

Hofmeister

(c)

Nehemiah Grew

(d)

G.B.Amici

Cleavage polyembryony is noticed in _________________

(a)

Orchids

(b)

Casuarina

(c)

Balanophora

(d)

Syzygium

Pick out the non-spermous seed

(a)

Wheat

(b)

Sunflower

(c)

Bean

(d)

Orchids

The type of endosperm noticed in Hydrilla seed is ___________

(a)

Ruminate endosperm

(b)

Nuclear endosperm

(c)

Cellular endosperm

(d)

Helobial endosperm

Which is not a part of mature seed?

(a)

Funiculus

(b)

Testa and tegma

(c)

hilum

(d)

Chalaza

Select the wrong statement(s) regarding cross-pollination.
(a) Pollination depends on external agent and so it is certain.
(b) New varieties are produced.
(c) Continuous cross-pollination leads to weaker progeny.
(d) Germination capacity is highly declined.

(a)

a and d

(b)

b and c

(c)

a, band d

(d)

a, c and d

Which of the following characters does not exist in Ornithophilous flowers?

(a)

Huge sized flowers

(b)

Bright coloured

(c)

Scented flowers

(d)

Nectar is secreted in large

Which of the following plant was introduced as a contaminant into India along with wheat?

(a)

Parthenium hysterophorus

(b)

Zea mays

(c)

Rosa indica

(d)

Mangifera indica

The most common type of ovule noticed in dicots and monocots is

(a)

Orthotropous

(b)

Anatropous

(c)

Campylotropus

(d)

Amphitropous

Generally, the pollen grains are liberated from another at ___________

(a)

2-celled stage

(b)

4-celled stage

(c)

6-celled stage

(d)

8-celled stage