Seed habit is an important step in evolution. It is due to

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Seed habit is an important step in evolution. It is due to

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Heterogamy

Heterospory

Homospory

Homogamy

answer is B.

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Detailed Solution

Concept: In vascular plants, seed habit is an evolutionary process. A seed was created as a result of the naked megasporangium being covered by a vascular integument. It is the most sophisticated and effective approach to sexual reproduction.
Heterospory is the process through which sporophytes of land plants produce two distinct types of spores. Different spore sizes are produced. While the smaller one is referred to as a microspore and is male, the larger one is known as a megaspore and is female. After that, these spores transform into male and female gametophytes. The pteridophytes frequently have them. Given that it results in the formation of seeds, it is the most significant evolutionary step in the plant.
Hence, the correct answer is option 2.

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