Effects of root pressure is also observable at (A)____ and (B)____ hence evaporation is low.

Answer

To answer the question regarding the effects of root pressure, we need to fill in the blanks with the appropriate terms. The question states: "Effects of root pressure is also observable at (A)____ and (B)____ hence evaporation is low."

### Step-by-Step Solution:

1. **Understanding Root Pressure**:
- Root pressure is defined as the pressure exerted by the roots of a plant to push water upwards through the xylem to the rest of the plant. This occurs due to the osmotic movement of water into the roots.

2. **Observing Root Pressure**:
- Root pressure is particularly noticeable during specific times of the day. It is most prominent at night and in the early morning when the plant is not losing water through transpiration.

3. **Identifying the Time Periods**:
- During the night, there is minimal evaporation because the temperature is lower and humidity is higher, which leads to reduced transpiration rates.
- In the early morning, the same conditions apply; thus, evaporation is still low.

4. **Filling in the Blanks**:
- Based on the understanding of root pressure and the times when it is observable, we can fill in the blanks:
- (A) Night
- (B) Early morning

5. **Final Answer**:
- Therefore, the complete sentence is: "Effects of root pressure is also observable at (A) Night and (B) Early morning, hence evaporation is low."