Question

Function of filiform apparatus is to

• A. recognize the suitable pollen at stigma
• B. stimulate division of generative cell
• C. produce nectar
• D. guide the entry of pollen tube.

Answer 1

The Correct Option is D

The question asks about the function of the filiform apparatus in plants. To find the correct answer, let's understand what the filiform apparatus is and its role in plant reproduction.

The filiform apparatus is a structure found in the synergid cells of the female gametophyte (embryo sac) in angiosperms (flowering plants). It consists of finger-like projections that extend into the micropylar region of the ovule. The role of the filiform apparatus is crucial in the fertilization process.

1. Recognize the suitable pollen at stigma: This is not the function of the filiform apparatus. The recognition of suitable pollen occurs at the stigma level and involves biochemical processes and interactions that determine compatibility, not the filiform apparatus's role.
2. Stimulate division of the generative cell: This option is incorrect because the division of the generative cell is part of the pollen tube's journey and is not influenced by the filiform apparatus.
3. Produce nectar: Nectar production happens in specific floral structures and is not related to the filiform apparatus.
4. Guide the entry of the pollen tube: This is the correct answer. The filiform apparatus plays a key role in guiding the pollen tube towards the egg cell for fertilization. It helps direct the pollen tube to enter the synergid cell through the micropyle and reach the egg apparatus in the ovule.

In conclusion, the function of the filiform apparatus is to guide the entry of the pollen tube during fertilization, making this the correct answer. This facilitates successful fertilization and seed development in flowering plants.