Choose the correct statement from amongst the following:

1

(a)

Dioecious (hermaphrodite) organisms are seen only in animals.

(b)

Dioecious organisms are seen only in plants

(c)

Dioecious organisms are seen in both plants and animals

(d)

Dioecious organisms are seen only in vertebrates

There is no natural death in single-celled organisms like Amoeba and bacteria because:

1

(a)

They cannot reproduce sexually

(b)

They reproduce by binary fission

(c)

Parental body is distributed among the offspring

(d)

They are microscopic

Identify the correct statement.

1

(a)

In sexual reproduction, the offspring produced are morphologically and genetically identical to the parent

(b)

Zoospores are sexual reproduction structures

(c)

In sexual reproduction, a single parent produces offspring with or without the formation of gametes

(d)

Conidia are asexual structures in Penicillium.

Which of the following is a post-fertilisation event in flowering plants?

1

(a)

Transfer of pollen grains

(b)

Embryo development

(c)

Formation of flower

(d)

Formation of pollen grains

Vegetative propagation in Pistia occurs by

1

(a)

Stolon

(b)

Offset

(c)

unner

(d)

Sucker

Which one of the following processes results in the formation of clone of bacteria?

1

(a)

Transformation

(b)

Transduction

(c)

Binary Fission

(d)

Conjugation

Banana is vegetatively propagated by

1

(a)

tubers

(b)

rhizomes

(c)

bulbs

(d)

suckers

A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has

1

(a)

haploid vegetative cells and diploid gametangia

(b)

diploid vegetative cells and diploid gametangia

(c)

diploid vegetative cells and haploid gametangia

(d)

haploid vegetative cells and haploid gametangia

Offspring formed by sexual reproduction exhibit more variation than those formed by Asexual reproduction because

1

(a)

sexual reproduction is a lengthy process

(b)

gametes of parents have qualitatively different genetic composition

(c)

genetic material comes from parents of two different species

(d)

greater amount of DNA is involved in sexual reproduction.

Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because

1

(a)

nodes are shorter than internodes

(b)

nodes have meristematic cells

(c)

nodes are located near the soil

(d)

nodes have non-photosynthetic cells