Gymnosperms are the ancestors of the Angiosperms or flowering plants which produce a seed encased in a structure such as a carpel.

* The sperm of bryophytes and pteridophytes have flagellae similar to those in animals, but higher plants, ( including Gymnosperms and flowering plants ) lack the flagellae and centrioles that are present in animal cells.

Some regulatory systems of Chlamydomonas are more complex than their homologs in Gymnosperms, with evolutionarily related regulatory proteins being larger and containing additional domains.

There are between 700 and 900 extant or currently living species of Gymnosperms.

The Gymnosperms are more common on poor acid soils and unbalanced soils with an excess of magnesium and other phytotoxic elements, derived from ultramafic rocks.

The Gymnosperms are more common on exposed ridges or next to rivers or creeks in floodplains.

Gymnosperms are more varied.

Gymnosperms, like all vascular plants have a sporophyte-dominant life-cycle.

Gymnosperms have a lignin that consists almost entirely of G with small quantities of H. That of dicotyledonous angiosperms is more often than not a mixture of G and S ( with very little H ), and monocotyledonous lignin is a mixture of all three.

Gymnosperms have their archegonium formed after pollination inside female pine cones ( megastrobili ).

Gymnosperms have major economic uses.

Gymnosperms typically have one integument ( unitegmic ) while angiosperms typically have two ( bitegmic ).

In Ghuguwa and Umaria the standing, petrified trunks of trees have been identified as Gymnosperms and Angiosperms-Monocotyledons and palms.

Details of the process vary according to the division of Gymnosperms in question.

Gymnosperms show evidence for biotic pollination as early as the Triassic period.

In any of these classifications, the hybrids become very unusual in being intergeneric hybrids, the only ones ever reported among the Gymnosperms.

Flora of New Zealand Volume IV: Naturalised Pteridophytes, Gymnosperms, Dicotyledons.

Flora of New Zealand Volume IV: Naturalised Pteridophytes, Gymnosperms, Dicotyledons.

2 ( Pteridophytes and Gymnosperms ): 315-323.

Nuclear DNA Amounts in Gymnosperms.

Angiosperms are seed-producing plants that produce flowers, having enclosed seeds.

The gymnosperms are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and Gnetales.

The seed-producing flowers are very fragrant and bloom in late fall.

The egg-shaped female ( seed-producing ) cones and smaller male ( pollen-producing ) cone clusters are produced on separate plants.

Cycads produce strobili, both pollen-producing and seed-producing, that are composed of sporophylls.

In order to attract new industries, 15 states or more are issuing tax free bonds to build government owned plants which are leased to private enterprise.

In the clay are entombed millions of pollen grains and spores which came from plants growing in the region at the time.

or a skilled labor force is trained before there are plants available in which they can be employed.

They are conscious of this state's new feeling of optimism and assurance and are definitely impressed by the number of new plants and construction projects in Rhode Island.

Our take-up machines and our twister-coners are undergoing important pilot plant testing for application with new high polymer yarns, in several fiber producing plants.

When they have 4 to 6 leaves and are thrifty little plants, it's time to set them out where they are to remain.

If the plants are cared for and protected over the winter, the second year is more prolific than the first.

A group of native trees or plants which are outstanding in a particular county can be featured at the site.

The big factories which are relatively near the centers of our cities -- the rubber factories in Akron, Chrysler's Detroit plants, U.S. Steel's Pittsburgh works -- often began on these sites at a time when that was the edge of the city, yet close to transport ( river ), storage ( piers ) and power ( river ).

They are all suburban plants, relying on the roads to keep them supplied with workers.

The plants along Route 128 are mostly well designed and nicely set against the New England rocks and trees.

plants are being taught to grow ''.

I now grok you are my people -- teach plants another way.

Most are photosynthetic like plants, and " simple " because their tissues are not organized into the many distinct organs found in land plants.

Algae lack the various structures that characterize land plants, such as phyllids ( leaves ) and rhizoids in nonvascular plants, or leaves, roots, and other organs that are found in tracheophytes ( vascular plants ).

Many food plants are, or are grown as, annuals, including virtually all domesticated grains.