Question

The growth of plants differs from growth of animals in being
A. Localised
B. Diffused
C. Localised and Diffused
D. None of the above

Answer 1

Hint: Plants show continuous growth throughout life. Animals show growth for a definite period.

Complete Answer:
- Plants keep growing as long as they live. They grow through a mixture of cell growth and cellular division which is called mitosis. The key to plant growth is meristem, a kind of plant part consisting of undifferentiated cells which will still divide and differentiate.
- The growth of animals is more restricted in time than that of plants, but cellular division is more generally distributed throughout the body of the organism. Height increase in mammals is restricted by cessation of cellular division and bone deposition within the long bones.
- We know that plants keep growing, but animals stop growing until a certain period; it grows for a definite period and stops. Growth in plants is localized to certain regions such as root, leaves. Growth in animals is diffused, it takes place in body and active regions.
From the above information, we can conclude that the growth of plants differs from growth of animals in being Localised and Diffuse.

Thus, option C is the correct answer.

Note:
Plant growth: 1. Here the growth involves increases in the number of parts.
2. Growth takes place during definite seasons.
3. Growing pattern is distinct to each species.

Animal growth: 1. Here it does not involve an increase in the number of parts.
2. Each species has a distinct season for growth.
3. Growing pattern is absent.