Alginic.

the brown algae gate, is a higher level of evolution of algae. Its main features are: plants are multicellular types, no single cells, plant size differences are very large, small height of about 1
to
2
cm, large up to a few meters, or even
60
meters or more, such as Giant algae; plant structure is simply branched filaments, such as water clouds, etc.; highly differentiated are thin-walled
tissues
bodies, such as keel, etc.; cell walls are made up of cellulose and brown algal gum; cells have a nucleus, nuclear membrane, nucleus, etc. Kernels; mitochondrials, pigments (equivalent to chlorophyll), endoenomic mesh, gorsyl and liquid bubbles, etc.; cells containing chlorophyll
a
and
c
, especially brown horned algae with high levels Lutein (a type of lutein), so algae are mostly brown, storage of photochemite products are mainly brown algae starch and glycol, etc. , swimming spores are
2
side-born but not equal length of whiplash. Breeding methods include nutritional reproduction, asexual reproduction and sexual reproduction
3
types. Nutritional reproduction, some for the algae body break, some are in the algae on the production of breeding branches, shedding, then germination into a new plant. Most species of asexual reproduction are spores produced in spore sacs for reproduction, most of which are swimming spores with
2
side births without waiting for long whiplash, and a few are static spores without whiplash, such as mesh algae- purpose species. There is also a sight that does not produce spores and does not reproduce asexually. The sexual reproduction of brown algae has three types of co-matching,
and
reproduction. Most of the life history of brown algae has obvious generational rotation (except for ink horn algae), some of which are the same generational alternating, such as water clouds. Most of them are spores developed by the heterogeneity generational alternating, such as the manatee and so on. A few species are interchangeable generations with developed ligands. Brown algae are
more
than 1500 species, the vast majority of
,
only 5 species of fresh water. China has
2
species
2
of fresh water. Brown algae are generally cold and warm seaweed, mostly born in the cold zone ocean, but also some born in the tropical ocean. Most grow in the middle and low tide zone and the sub-tidal zone, some can be born in the tens of meters deep sea floor. The economic value of brown algae is large, many kinds are edible, such as sea brings, crony dishes, antlers and so on. Some can be used to extract brown algal gum, iodine, glycol, potassium chloride and so on. Some large brown algae can be used as feed and agricultural fertilizer, and some species can be used for medicine. In modern times, some countries have used algae fermentation to produce biogas (methane) to explore the development of new energy sources, and China's Yellow Sea Institute has also successfully introduced and cultivated giant algae on Long Island. In addition, some large brown algae, such as keel algae, often thrive on the seafloor and are often referred to as "seafloor forests", which provide a good habitat for fish and other aquatic animals and have important ecological significance and economic value.

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