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Seaweeds
Algae can be unicellular or multicellular, depending on what type of algae it is.
The brown seaweeds are tough and able to live in wave-exposed waters near the surface. They are the most common seaweeds of the intertidal rocky shore, usually found in and below the sublitoral fringe.http://www.seafriends.org.nz/enviro/Habitat/rsbrown.htm
Algae grows on the sea bed in shallow waters. Yes, majority of algae are unicellular. One common example of a unicellular algae is the green algae Prototheca.
Moss. They obtain water through osmosis, instead of a vascular system.
Red algae is a type of seaweed. This seaweed lives in warm waters.
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Seaweeds
Marine habitats are home to seaweeds, algae, sea grasses, and mangroves.
Christian Wiencke has written: 'Biology of polar benthic algae' -- subject(s): Marine algae, Benthic plants 'Antarctic seaweeds' -- subject(s): Marine algae
F. G. Hardy has written: 'Flora' -- subject(s): Marine algae, Algae 'A check-list and atlas of the seaweeds of Britain and Ireland' -- subject(s): Marine algae
Seaweeds belong to three kingdoms: Kingdom Plantae (chlorophyte, or "green" algae seaweeds), Kingdom Plantae (rhodophyte, or "red" algae seaweeds), Kingdom Chromista (phaeophyte, or "brown" algae seaweeds) Kingdom Chromista (xanthophyte, or "yellow-green" algae seaweeds), and Kingdom Bacteria (cyanophyte, or "blue-green" algae seaweeds). Seaweeds that belong to the Kingdom Plantae are plants; the others, strictly speaking, are not. Kombu (kelp), arame (kelp), limu moui (kelp), hijiki, mozuku, and wakame are not plants. Wikipedia places them under Kingdom Chromalveolata because they are classified as "brown" algae seaweeds. However, nori (laver), ogo (limu), and dulse are classified as "red" algae seaweeds and are placed under Kingdom Plantae. Kingdom Protista, which includes the chlorophyll-containing, self-propelling euglenozoa, is a fourth kingdom of algae which contains no species of seaweeds. Thomas Cavalier-Smith defined Kingdom Chromista in 1981 and redefined it as Kingdom Chromalveolata in 2005. However, in 2008, other biologists have proposed splitting Kingdom Chromalveolata into at least two smaller kingdoms and this newer version has gained increasing support. The cancer-preventing marine polysaccharide, fucoidan, and the weight loss causing marine carotenoid, fucoxanthin, are both always plentiful in "brown" algae seaweeds, including kombu, arame, limu moui, hijiki, mozuku, and wakame. "Yellow-green" algae seaweeds, which are never sold commercially, do not contain much fucoidan or fucoxanthin, even though they are still classified as members of Kingdom Chromalveolata together with the "brown" algae seaweeds.
Seaweeds are not plants it is a type of algae
Dinabandhu Sahoo has written: 'Seaweeds of Indian coast' -- subject(s): Marine algae
No , , sea weeds are not included in kingdom Monera but in Kingdon Protista Seaweeds belong to three kingdoms: Kingdom Plantae (chlorophyte, or "green" algae seaweeds), Kingdom Plantae (rhodophyte, or "red" algae seaweeds), Kingdom Chromista (phaeophyte, or "brown" algae seaweeds) Kingdom Chromista (xanthophyte, or "yellow-green" algae seaweeds), and Kingdom Bacteria (cyanophyte, or "blue-green" algae seaweeds).
Craig W. Schneider has written: 'An annotated checklist of Connecticut seaweeds' -- subject(s): Marine algae
Seaweeds refers to large marine forms of algae, they differ in other living things in terms of reproduction, at first they multiply simply by asexual reproduction then undergoes at large of sexual reproduction.