Question

The process during double fertilization in which non motile male gametes are carried through hollow pollen tube is called

• A. chalazogamy
• B. porogamy
• C. mesogamy
• D. siphonogamy

Hint:

Remember the root words to easily identify the terms: 'poro-' refers to the micropylar pore, 'chalazo-' refers to the chalaza, 'meso-' means middle (integuments), and 'siphono-' refers to a tube.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
The process of fertilization in angiosperms involves the entry of the pollen tube into the ovule.
The pollen tube acts as a hollow carrier for the non-motile male gametes, protecting them as they travel towards the female gametophyte.

Step 2: Key Formula or Approach:
Identify the correct botanical term based on the etymology and biological definition of the pollen tube's function in carrying gametes.

Step 3: Detailed Explanation:
Porogamy is defined as the entry of the pollen tube directly through the micropyle.
Chalazogamy occurs when the pollen tube enters the ovule through the chalazal end.
Mesogamy is the entry of the pollen tube through the integuments or the funiculus.
Siphonogamy, however, is the specific botanical term used to describe the transport of non-motile male gametes through a hollow pollen tube.

Step 4: Final Answer:
The correct process is siphonogamy, which corresponds to option (D).