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Unlike bryophytes and pteridophytes, in gymnosperms the male and female gametophytes do not have an independent free-living existence. They remain within the sporangia retained on the sporophytes.

1. Pinus is monoecious in which male & female cones are borne on different branches.
2. Pinus is monoecious i.e. both male and female cone are present in same plant but on different branches. Pinus, with over 100 species, is the largest genus of conifers and the most widespread genus of trees in the Northern Hemisphere.
3. Pinus are also extensively planted in temperate regions of the Southern Hemisphere. Pines have a relatively rich fossil record.
4. Equisetum is a vascular cryptogam. Equisetum is the only living genus in the Equisetaceae, a family of vascular plants that reproduce by spores rather than seeds. They are commonly known as horse tails.

Correct answer: Pinus is monoecious i.e. both male and female cone are present in same plant but on different branches. Pinus, with over 100 species, is the largest genus of conifers and the most widespread genus of trees in the Northern Hemisphere.

Solution

The correct choice describes Pinus as monoecious, meaning a single plant bears both male and female cones. In Pinus, these cones are typically found on different branches, which fits gymnosperm reproduction where gametophytes remain dependent on the sporophyte.

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