Selina solutions concise biology class 8 icse Solutions for Chapter 2 reproduction in plants

Q1) What is vegetative reproduction?

Q2) Briefly explain why a gardener prefers to grow certain plants vegetatively?

Q3) Why is it disadvantageous to grow plants vegetatively?

Q4) What is meant by pollination? Explain the structure of germinating pollen grain with the help of a labelled diagram.

Q5) Imagine all the seeds produced by a plant happen to fall under the same plant and sprout into new plants. Mention any two problems that will be faced by the new plants.

Q6) What is a flower ? Draw a neat labelled diagram showing the LS of a typical flower.

Q7) Write shortnotes in the following:

(a) Micropropagation

(b) Bryophyllum

(c) Vegetative reproduction

(d) Grafting

Q8) How artificial pollination is useful to plant breeders? Discuss briefly.

Q9) With the help of suitable diagrams, describe

(a) Binary fission in plants

(b) Budding in yeast cell

Q1) Put a tick mark against the correct alternative in the following statements.

(a). Pollen is produced in the :

1. Filament
2. Style
3. Pistil
4. Anther

(b). Reproductive whorls of a flower are:

1. Stamens and carpels

2. Sepals and petals

3. Sepals and stamens

4. Petals and carpels

(c) grafting is a method of :

1. Artificial vegetative propagation

2. Sexual reproduction

3. Artificial pollination

4. Cross-pollination

(d). Which one of the following is a false fruit?

1. Tomato

2. Apple

3. Potato

4. Pea

Q1) Write two ways in which pollination may occur in plants.

Q2) Name the three agents of pollination.

Q3) Give two features of flowers which favour pollination by insects.

Q4) Name two characteristics of flowers in which pollination occur by wind.

Q5) What is a “false fruit”? Give one example.

Q6) Name any three agencies for dispersal of seeds.

Q7) Fill in the blanks by selecting suitable words:

(unisexual, fertilisation, fruit, stamen, anther, bisexual, pollination, seed, ovary)

(a) A flower that bears both the male and the female parts is known as ______ flowers.

(b) A flower-bearing only male or female parts is known as ______ flowers.

(c) Transfer of pollen grains from the anther to the stigma is known as _______.

(d) The fusion of male cells with female cells is called _______.

(e) The ovule develops into a _______.

(f) The ovary of the flower develops into a _______.