Question

Which one of the following is considered important in the development of Seed Habit?

• A. Dependant sporophyte
• B. Free-living gametophyte
• C. Haplontic life cycle
• D. Heterospory

Answer 1

The correct option is D

Heterospory

The correct option is D.

The explanation for the correct option:

1. The ability to form seeds is known as seed Habit.
2. Seed formation takes place after the fertilization of male and female gametophytes or spores.
3. Hetero means different and spory means spores.
4. When different types of spores are present then the condition is known as heterospory.
5. In heterospory, two types of spores are present, small spore known as male spore or microspore and large spore known as megaspore or female spore.

The explanation for the incorrect options:

Option A:

1. When a sporophyte is dependent on the gametophyte for its nutrition and development, it is known as a dependent sporophyte.
2. They are found in Bryophytes.
3. This is not responsible for the development of seed habits.

Option B:

1. When gametophytes are independent of sporophytic generation, which means not dependent on sporophyte for their nutrition or development, then it is known as free-living gametophyte.
2. They are found in pteridophytes.
3. This is not responsible for the development of seed habits.

Option C:

1. The Life cycle pattern in which the haploid stage is dominant then it is known as the haplontic life cycle.
2. This is not responsible for the development of seed habits.

Final answer: Heterospory is considered important in the development of Seed Habit.