GROWTH

Question 1

What is growth ?

Answer 1

It is an irreversible change leading to change in the dimension of the living organism.

It is not the defining feature of the living organism

Question 2

What type of growth is seen in living being ?

Answer 2

Growth of the living organism is INTRINSIC (due to accumulation of material within)

Question 3

What are the twin characteristics of the growth ?

Answer 3

1. Increase in number

2. Increase in mass

Question 4

Growth occurs in which living organism ?

Answer 4

Growth occurs in both the unicellular and multicellular and in both the animals and plants.

Question 5

How is the growth in the unicellular organism differ form the multicellular ?

Answer 5

In the unicellular organism growth and reproduction are mutually inclusive event. Growth and reproduction are synonymous in the unicellular organism.

Whereas in multicellular organism are mutually exclusive(differ) events.

Question 6

What is the pattern and duration of the growth in the plants ?

Answer 6

In the plants growth is

1. Localized - At specific location (due to meristem)
2. Indefinite - unlimited growth (due to actively dividing cell called meristems)

Question 7

What is the pattern and duration of the growth in the animals ?

Answer 7

In the animals growth is

1. Diffused - Throughout the body
2. Definite - Up to a limit

Question 8

Why growth is not taken as the defining feature of the living beings ?

Answer 8

Growth cannot can be taken as the defining feature of the living organism because there are certain non-living things which show growth.

Question 9

Give the example of the non living things which show growth and what is the feature of their growth ?

Answer 9

1. Example - mountain , rocks , sand dune
2. Features - a) Reversible growth
   b) Extrinsic (due to the accumulation of the materials from the outside )