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Pinus plant 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.

1. Pinus are also extensively planted in temperate regions of the Southern Hemisphere. Pines have a relatively rich fossil record.
2. 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.
3. Equisetum is a “living fossil,” as it is the only known genus of the entire class Equisetopsida.
4. The important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms are presence of vessel elements and absence of archegonia.

Correct answer: Pinus are also extensively planted in temperate regions of the Southern Hemisphere. Pines have a relatively rich fossil record.

Solution

The correct statement is the one that continues describing Pinus: pines are widely planted in temperate Southern Hemisphere regions and have a rich fossil record. The other options shift to unrelated plant groups or discuss different characteristics.

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