how many among the following are defining feature of living beings? ( reproduction, growth, metabolism, cellular organisation, consciousness)

Options

A. 1
B. 2
C. 3
D. 4

Answer

To determine how many of the listed features are defining characteristics of living beings, we will analyze each feature one by one:

1. **Reproduction**: This is a fundamental characteristic of living organisms. Living beings have the ability to reproduce, either sexually or asexually, to ensure the continuation of their species.

2. **Growth**: Growth is another essential feature of living beings. All living organisms undergo growth, which involves an increase in size and mass, typically through cell division and differentiation.

3. **Metabolism**: Metabolism refers to the chemical processes that occur within a living organism to maintain life. It includes all the biochemical reactions that provide energy and the building blocks for growth and reproduction. Therefore, metabolism is also a defining feature of living beings.

4. **Cellular Organization**: Living organisms are composed of cells, which are the basic units of life. This cellular organization is crucial for the functioning of living beings, whether they are unicellular or multicellular.

5. **Consciousness**: While consciousness may be a characteristic of some higher organisms, it is not a defining feature of all living beings. Many simple organisms, such as bacteria, do not possess consciousness.

Now, let's summarize the defining features of living beings from the list:

- Reproduction: Yes
- Growth: Yes
- Metabolism: Yes
- Cellular Organization: Yes
- Consciousness: No

Based on this analysis, four of the five features listed (reproduction, growth, metabolism, and cellular organization) are defining characteristics of living beings. Therefore, the answer is **4**.