HORTICULTURE

Detailed explanation-1: -Ginkgo belongs to the division Ginkgophyta. Ginkgo is a genus of highly unusual non-flowering plants. Thus, the correct answer is option A.

Detailed explanation-2: -Like the Lycopodium, some Pteridophytes have tiny leaves called microphylls, while others have huge leaves called megaphylls (e.g., Pteris). Spores may also be present on the underside of leaves, named sporophylls. They produce spores to reproduce.

Detailed explanation-3: -Ferns, horsetails (often treated as ferns), and lycophytes (clubmosses, spikemosses, and quillworts) are all pteridophytes.

Detailed explanation-4: -True ferns are megaphyllous: their leaves originated from flattened branches. True ferns have unique sporangia: leptosporangia.

Detailed explanation-5: -Angiosperms are heterosporous forming male and female spores which is critical for seed habit. Pteridophytes are mostly homosporous. Some pteridophytes like Selaginella is heterosporous but there is no seed formation.