The part of the embryosac which help in guiding thee pollen tube towards it is m……. ( P) ….....and it is through……..(Q) ……….

Options

A. P is antipodal cells and Q is thigmotaxis
B. P is egg and Q is chemotaxis
C. P is a secondary nucleus and Q is thigmotaxis
D. P is synergids and Q is chemotaxis

Answer

To solve the question regarding the part of the embryo sac that helps in guiding the pollen tube towards it, we need to identify the correct components involved in this process.

### Step-by-Step Solution:

1. **Understanding the Embryo Sac Structure**:
- The embryo sac consists of various components, including antipodal cells, synergids, and the egg cell.
- The synergids are located at the micropilar end of the embryo sac.

2. **Identifying the Role of Synergids**:
- The synergids play a crucial role in guiding the pollen tube towards the egg cell for fertilization. They secrete chemical signals that attract the pollen tube.

3. **Recognizing the Process Involved**:
- The movement of the pollen tube towards the egg cell is facilitated by a process known as chemotaxis. This is where the pollen tube responds to chemical signals released by the synergids.

4. **Filling in the Blanks**:
- For the first blank (P), the correct answer is "synergids."
- For the second blank (Q), the correct answer is "chemotaxis."

### Final Answer:
The part of the embryo sac which helps in guiding the pollen tube towards it is **synergids (P)** and it is through **chemotaxis (Q)**.