Question

The role of Filiform apparatus in synergids is to:

• A. Protect the egg apparatus
• B. Endosperm formation
• C. Guide the entry of pollen tube
• D. Prevention of gamete entry

Hint:

The precise guidance of pollen tubes is essential for successful fertilization.

Answer 1

The Correct Option is C

The role of Filiform apparatus in synergids is to Guide the entry of pollen tube.

(A) Protect the egg apparatus - Incorrect: While it may offer some protection, this isn't its primary role.

(B) Endosperm formation - Incorrect: This occurs after fertilization and involves the central cell.

(C) Guide the entry of pollen tube - Correct: The finger-like projections secrete chemoattractants to direct the pollen tube.

(D) Prevention of gamete entry - Incorrect: It actually facilitates gamete delivery.

The correct answer is (C), as the filiform apparatus' specialized structure ensures precise pollen tube guidance to the embryo sac.

Answer 2

The filiform apparatus is a structure in the synergids of the embryo sac of flowering plants. Its primary role is to help guide the entry of the pollen tube into the embryo sac.

The pollen tube grows toward the synergids, and the filiform apparatus secretes chemical signals that attract the pollen tube.
The synergids also play a role in fertilization by assisting in the delivery of sperm cells to the egg cell.

Other options are incorrect because:
The filiform apparatus is not directly involved in protecting the egg apparatus, endosperm formation, or prevention of gamete entry.

Option (C) is correct because the filiform apparatus helps guide the pollen tube into the embryo sac for fertilization.