Refer to the given dichotomous key and select the incorrect statement regarding P-T.
I. (a) The plant undergoes vegetative propagation.- Go to II
(b) The plant undergoes sexual reproduction - Go to III
II. (a) The plant propagates vegetatively by stem. - P
(b) The plant propagates vegetatively by leaf. - Q
III. (a) Its seeds are dispersed through abiotic agent. - Go to IV
(b) Its seeds are dispersed through animals. - R
IV. (a) Its seeds are dispersed through wind. - S
(b) Its seeds are dispersed through water. - T

Options

A. P could be Eichhornia that propagates through offsets or Oxalis that propagates through runners.
B. Q could be Bryophyllum whereas R could be Urena.
C. R could be Hiptage whereas S could be Balsam.
D. S could be Dandelion whereas T could be lotus.

Explanation

To solve the question regarding the incorrect statement about plants P and T using the provided dichotomous key, we will analyze each step systematically.

### Step-by-Step Solution:

1. **Understanding the Dichotomous Key**:
- The key starts with two options:
- (a) The plant undergoes vegetative propagation.
- (b) The plant undergoes sexual reproduction.

2. **Identifying Plant P**:
- If we choose (a) for vegetative propagation, we go to the next step (II).
- In step II, we have two further options:
- (a) The plant propagates vegetatively by stem. (This leads to plant P)
- (b) The plant propagates vegetatively by leaf. (This leads to plant Q)

3. **Identifying Plant Q**:
- Plant Q is identified as a Bryophyllum, which propagates vegetatively by leaves.

4. **Identifying Plant T**:
- If we choose (b) in step I (indicating sexual reproduction), we move to step III.
- In step III, we have two options:
- (a) Its seeds are dispersed through abiotic agents. (Go to IV)
- (b) Its seeds are dispersed through animals. (This leads to plant R)

5. **Analyzing Seed Dispersal**:
- In step IV, we have:
- (a) Its seeds are dispersed through wind. (This leads to plant S)
- (b) Its seeds are dispersed through water. (This leads to plant T)

6. **Determining Incorrect Statements**:
- From the analysis:
- Plant P propagates through stem (correct).
- Plant Q propagates through leaf (correct).
- Plant R is associated with seed dispersal through animals (correct).
- Plant S is associated with wind dispersal (correct).
- Plant T is associated with water dispersal (correct).

7. **Identifying the Incorrect Statement**:
- The incorrect statement is related to the plant that is said to disperse seeds through animals or the plant that is said to disperse seeds through wind. The video transcript indicates that the seeds of hip-touch are dispersed by wind or water, not animals, making this statement incorrect.

### Conclusion:
The incorrect statement regarding plants P and T is that the seeds of hip-touch are dispersed through animals.