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In late spring the plant produces rigid flower spikes consisting of three to six spikelets bearing long, stiff awns which assist in seed distribution. When the grass matures, the spikelets fall off in their entirety to germinate on the ground, [2] and the long awns which give the plant its name assist in dispersal by animals, wind or water. [4]
One of the outcomes of plant reproduction is the generation of seeds, spores, and fruits [13] that allow plants to move to new locations or new habitats. [14] Plants do not have nervous systems or any will for their actions. Even so, scientists are able to observe mechanisms that help their offspring thrive as they grow.
Grass carp require long rivers for the survival of the eggs and very young fish, and the eggs are thought to die if they sink to the bottom. [6] Adult grass carps feed primarily on aquatic plants, both higher aquatic plants and submerged terrestrial vegetation, but may also eat detritus, insects and other invertebrates.
Some plant species, including many trees, do not produce seeds until they reach maturity, which may take many years. Seeds can be difficult to acquire, and some plants do not produce seed at all. Some plants (like certain [4] plants modified using genetic use restriction technology) may produce seed, but not a fertile seed. [5]
Syringodium filiforme, commonly known as manatee grass, is a species of marine seagrass. It forms meadows in shallow sandy or muddy locations in the Caribbean Sea and the Gulf of Mexico, and is also found in the Bahamas and Bermuda. [1] [2] It occurs to a depth of about 20 m (66 ft), and even deeper where water is very clear. [1]
Turtle grass is dioecious, which means that there are separate male and female plants, each which produce an imperfect flower containing only one sex. Sexual reproduction takes place from April to July depending on location, though flowering has been observed during warm winters in Tampa Bay, Florida.
Vallisneria americana, commonly called wild celery, water-celery, tape grass, or eelgrass, [2] is a plant in the family Hydrocharitaceae, the "tape-grasses". V. americana is a fresh water species that can tolerate salt, living in salinities varying from fresh water (0 parts per thousand) to 18 parts per thousand, although the limit to the salt tolerance is unclear, and is generally dependent ...
The characteristics of the Posidonia plant, its growth dynamics and the large amount of biomass produced, are factors that can sustain very diverse plant and animal communities. Distinguished are: epiphytic communities (that is, bacteria, algae and bryozoa that colonise the surface of the leaves and rhizomes of the plant), vagile and sessile ...