Select an incorrect statement :

Question

Accepted Answer

Option 4 is the correct answer because it states that "Waste produced by human activities is always biodegradable." This statement is incorrect because not all waste generated by human activities is biodegradable. Biodegradable waste refers to materials that can be broken down by natural processes involving microorganisms, such as food scraps, paper, and some natural fibers. However, many human-produced wastes, such as plastics, metals, and certain chemicals, are not biodegradable and can persist in the environment for long periods, causing pollution and harm to ecosystems.

Now, let's explain why each of the other options is correct and not the incorrect statement:

1. **Various components of ecosystem are interdependent.**  
   This statement is correct because ecosystems are complex networks where living organisms (plants, animals, microorganisms) and non-living components (water, air, minerals) interact and depend on each other for survival. For example, plants produce oxygen and food that animals need, while animals contribute to pollination and seed dispersal for plants.

2. **Loss of energy limits the number of trophic levels in an ecosystem.**  
   This statement is correct because energy transfer between trophic levels in an ecosystem is inefficient, with only about 10% of energy being passed on to the next level. This loss of energy at each trophic level limits the number of levels that can be sustained, as there is not enough energy to support a large number of levels.

3. **CFC plays major role in ozone depletion.**  
   This statement is correct because chlorofluorocarbons (CFCs) are known to be significant contributors to ozone layer depletion. When CFCs are released into the atmosphere, they eventually reach the stratosphere, where they are broken down by ultraviolet radiation, releasing chlorine atoms that destroy ozone molecules.

In conclusion, Option 4 is the incorrect statement because it inaccurately claims that all human-produced waste is biodegradable, which is not true.