Insectivorous plants grow on soil which is deficient in

Question

Accepted Answer

The correct answer is **1. Nitrogen**.

### Explanation:

Insectivorous plants, also known as carnivorous plants, typically grow in nutrient-poor environments, particularly in soils that are deficient in nitrogen. These plants have adapted to their environments by developing specialized mechanisms to capture and digest insects and other small animals, allowing them to obtain the nitrogen and other nutrients they need for growth.

#### Why Nitrogen is Important:
- **Nitrogen** is a crucial element for plant growth as it is a key component of amino acids, proteins, and nucleic acids (DNA and RNA). In many ecosystems, nitrogen is often the limiting nutrient, meaning that its scarcity can restrict plant growth.
- Insectivorous plants have evolved to supplement their nitrogen intake by capturing and digesting insects, which are rich in nitrogen. This adaptation allows them to thrive in environments where the soil lacks sufficient nitrogen.

#### Why Other Options are Incorrect:
- **2. Carbon**: Carbon is abundant in the atmosphere as carbon dioxide (CO2) and is essential for photosynthesis. Plants, including insectivorous ones, can obtain carbon from the air, so it is not a limiting factor in their growth.
  
- **3. Sulphur**: While sulphur is important for certain amino acids and proteins, it is generally not as limiting as nitrogen in many ecosystems. Insectivorous plants primarily seek nitrogen rather than sulphur.

- **4. Potassium**: Potassium is essential for various physiological processes in plants, including osmoregulation and enzyme activation. However, like carbon, potassium is often available in sufficient quantities in the soil and does not typically limit the growth of insectivorous plants.

In summary, insectivorous plants are specifically adapted to thrive in nitrogen-deficient soils by obtaining the necessary nitrogen from their prey, making **Nitrogen** the correct answer.