In which of the following organism, self-fertilization is seen?

1

(a)

Fish

(b)

Roundworm

(c)

Earthworm

(d)

Liver fluke

Which of the following animal is having longitudinal binary fission?

1

(a)

Euglena

(b)

Plasmodium

(c)

Planaria

(d)

Paramecium

(e)

Hydra

Banana is vegetatively propagated by

1

(a)

tubers

(b)

rhizomes

(c)

bulbs

(d)

suckers

Which one of the following is common to multicellular fungi, filaments algea and protonema of mosses?

1

(a)

Diplontic life cycle

(b)

Members of kingdom plantae

(c)

Mode of Nutrition

(d)

Multiplication by fragmentation

Which is the vital link between organisms of one generation and the next generation?

1

(a)

Zygote.

In which plants does the zygote develop a thick wall which is resistant to the desication and damage and undergoes a period of rest before germination?

1

(a)

Fungi and algae

What are the events included in post-fertilisation?

1

(a)

It includes the events after the formation of zygote. It is the first cell of new generation events that, factors sexually reproducing organisms.

On which factors does the development of zygote depends?

1

(a)

The development of zygote depends on the type of life cycle of the organism and the nature of environment.

What happens to the fate of zygote in algae and fungi?

1

(a)

In many algae and fungi, the zygote secretes a thick wall around itself and undergoes a period of rest before germination. It undergoes meiosis and the product of meiosis form haploid individuals.

The cell division involved in gamete formation is not of the same type in different organisms.  Justify.

2

(a)

The generative cell of a two-celled pollen divides in the pollen tube but not in three celled pollen. Give reasons.

2

(a)

What are possible types of pollination in chasmogamous flowers. Give reasons.

2

(a)

Refer to the diagram given below and answer the questions that follow.

i) Label the parts A and B
ii) Which part of flower develops into seed and fruit?
iii) What is the function of both the labeled parts?

3

(a)

Mohan "got very much excited to visit his hometown Kolkata after 5 years. On his way to his house from the railway station he saw that almost all small ponds were covered with some green weed,
(a) What could be the reason of this green cover.
(b) What damages does it cause to the ecology?

5

(a)