Question

Which of the following is deemed vital to the development of seed habit?
A. Heterospory
B. Dependant sporophyte
C. Free-living gametophyte
D. Haplontic life cycle

Answer 1

Hint:
Before we proceed with the problem, it is important to know about the development of seed habits.
The most complicated kind of reproduction is the seed habit, which is a form of sexual reproduction. The retention and germination of a single megaspore within a megasporangium as well as the adaptation of heterospory are both regarded as components of the seed habit. It is primarily used by terrestrial plants and is thought to be the most intricate and effective form of sexual reproduction.

Complete step by step answer:
The development of seed habits is thought to depend on heterospory. The term "seed habit" refers to the capacity to generate seeds. After the fertilization of male and female gametophytes or spores, seeds are produced.
Hetero denotes various, whereas spory refers to spores. Heterospory is the term for the situation where various spore types are present. In heterospory, two different spore types, a small spore known as a male spore or microspore and a huge spore known as a megaspore or female spore, are present.
Heterospory is a manifestation of the way that plants determine their sexual identity. It is the most important evolutionary process in vascular plants because it ultimately leads to the development of the seed.

Option ‘A’ is correct

Note:
When a sporophyte relies on the gametophyte for growth and survival, it is said to be "dependent." Gametophytes are referred to as "free-living gametophytes" when they are not dependent on sporophyte generation, implying that they do not require sporophytes for growth or nutrition. The haploid stage predominates in the cell division pattern known as the haplontic life cycle. The formation of seed habits is not caused by them.