Gymnosperms characteristics pdf

Cycas acts as the connecting link between Pteridophytes and Gymnosperms. Anatomical Characteristics. Gnetum is a connecting link between Gymnosperms and Angiosperms. Reproduction in Gymnosperms. Male cone, Microsporophylls and Microspores. Female cone, Megasporophyll and Ovule. Pollination and Fertilization.

Angiosperms also show meroblastic development. Integument of the ovule forms the seed coat. You might also like…. Pteridophytes General Characteristics. Bryophytes General Characteristics. Algae General Characteristics. Fungi General Characteristics.

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Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Share Email. Top clipped slide. Download Now Download Download to read offline. Gymnosperm characteristics Mar. Mohd Tariq Follow. Gymnosperm trees Botany cloutier. Mangrove field guide. Plant taxonomy. Related Books Free with a 30 day trial from Scribd. Elizabeth Howell.

Related Audiobooks Free with a 30 day trial from Scribd. On Animals Susan Orlean. Pastoral Song James Rebanks. A Wild Idea Jonathan Franklin. Gymnosperm characteristics 1. Early characteristics of seed plants were evident in fossil progymnosperms of the late Devonian period around million years ago.

The term extant contrasts with extinct. The other extant groups are the 75 - 80 species of Gnetales and one species of Ginkgo. Characteristics of Gymnosperms There exist a set of standard feature or characteristics that help to identify gymnosperms. The microspores develop into pollen grains and the megaspores are in an ovule. It is represented by a perennial, evergreen, woody plant.

Most of them are trees and some are shrubs. There are no herbs. They have monopodial growth represented by one main axis. As the axis grows taller it increases in diameter due to secondary growth. Stem branches are of two types: 1. Long shoots or branches of unlimited growth. Dwarf shoots or branches of limited growth 7. They originated from the seed ferns.

They are usually woody trees except Zamia pygmaea. The leaves are arranged in whorls at the apex of the stem ; they are pinnately compound. The micro-and megasporophylls usually from male and female strobili.

The plant is 2- 3. The leaves are 1.