Identify the characters of plant where 8-nucleate embryo sac was first studied by strasburger
(a) Micropyle, chalaza and funiculus in same vertical line
(b) Both unisexual and bisexual flowers on same plant
(c) Filiform apparatus conducts food from endsoperm to egg apparatus
(d) Long funiculus coils like watch spring around the ovule.

Options

A. a , b and c
B. a and b
C. b and d
D. a and c

Answer

To identify the characters of the plant where the 8-nucleate embryo sac was first studied by Strasburger, we will evaluate each of the provided statements one by one.

### Step-by-Step Solution:

1. **Statement A: Micropyle, chalaza, and funiculus in the same vertical line.**
- The micropyle, chalaza, and funiculus are indeed aligned in a vertical arrangement in the embryo sac. This statement is **correct**.

2. **Statement B: Both unisexual and bisexual flowers on the same plant.**
- The plant studied by Strasburger does exhibit both unisexual (unisexual flowers) and bisexual flowers on the same plant. This statement is also **correct**.

3. **Statement C: Filiform apparatus conducts food from endosperm to egg apparatus.**
- The function of the filiform apparatus is not to conduct food from the endosperm to the egg apparatus. Instead, its primary role is to guide the pollen tube to the egg apparatus. Therefore, this statement is **incorrect**.

4. **Statement D: Long funiculus coils like a watch spring around the ovule.**
- The long funiculus does not coil around the ovule like a watch spring; its role is to connect the ovule to the ovary. Thus, this statement is also **incorrect**.

### Conclusion:
- The correct statements are **A and B**. Statements C and D are incorrect.

### Final Answer:
The characters of the plant where the 8-nucleate embryo sac was first studied by Strasburger are:
- (a) Micropyle, chalaza, and funiculus in the same vertical line (Correct)
- (b) Both unisexual and bisexual flowers on the same plant (Correct)
- (c) Filiform apparatus conducts food from endosperm to egg apparatus (Incorrect)
- (d) Long funiculus coils like watch spring around the ovule (Incorrect)

Thus, the correct options are **A and B**.

---