ABA stimulates the ..A.. of stomata in the epidermis and ..B.. the tolerance of plants to various kinds of stresses. So it is termed as the ..C.. hormone

Options

A. A-opening, B-decreases, C-stress
B. A-closing, B-increases, C-juvenile
C. A-closing, B-decreases, C-juvenile
D. A-closing, B-increases, C-stress

Answer

To solve the question, we need to fill in the blanks with appropriate terms related to the functions of Abscisic Acid (ABA) in plants.

1. **Understanding the Role of ABA**: Abscisic Acid is a plant hormone that plays a crucial role in regulating various physiological processes in plants, particularly in response to stress conditions.

2. **Filling in the First Blank (A)**: The first blank asks what ABA stimulates in the stomata of the epidermis. ABA is known to cause the closing of stomata, especially during drought conditions to prevent water loss. Therefore, the correct term for blank A is "closing".

3. **Filling in the Second Blank (B)**: The second blank asks what ABA does to the tolerance of plants to various kinds of stresses. ABA is known to enhance the stress tolerance of plants, making them more resilient to conditions such as drought, salinity, and extreme temperatures. Thus, the correct term for blank B is "increases".

4. **Filling in the Third Blank (C)**: The final blank asks for the term that describes ABA in relation to its function. Given that ABA is primarily involved in helping plants cope with stress, it is commonly referred to as a "stress hormone". Therefore, the correct term for blank C is "stress".

Putting it all together, we have:
- A = Closing
- B = Increases
- C = Stress

Thus, the complete statement reads: "ABA stimulates the closing of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses. So it is termed as the stress hormone."