By Sherman Hollar
Micro organism, algae, and protozoamicroorganisms which are simply neglected in our day-by-day livescan be present in a large choice of destinations and serve innumerable ecological reasons. whereas a few such organisms were linked to sickness, they've got additionally been priceless in agriculture and within the creation of yes meals, drugs, and different prerequisites. This informative quantity examines the homes and makes use of of those strong and crucial existence types. image organizers and certain photos deliver the miniscule info of those entities to the leading edge.
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Extra resources for A Closer Look at Bacteria, Algae, and Protozoa (Introduction to Biology)
Sometimes they bud all around the sides and form mats or long chains of cells called filaments. Some of these filaments and mats float onto rocks in quiet places where the motion of the water is not strong enough to carry them off again. These filaments cling to the surface while the floating cells wave in the water, gather the food, bud, and spread into feathery, leaflike fronds. The portion that clings to the rocks or other substrate is called a holdfast. Some species of multicellular algae reproduce by means of spores—tiny collections of reproductive tissue that form on the alga’s surface and are washed away by the water.
Species of Fucus, or rockweed, live in the intertidal zones of rocky shorelines. There are also some tropical species, such as the free-floating masses of Sargassum. All phaeophytes are multicellular and range in size from seaweed made up of filaments, such as the species Ectocarpus, to the giant kelp that form underwater forests. Among the largest of the kelp are members of the genera Laminaria, Macrocystis, and Nerocystis. Brown algae are so colored because of the presence of a brown pigment called fucoxanthin.
In fresh water, the algae growth may be greatly increased by nutrient-rich pollution, such as a runoff that contains fertilizer. As a group, the algae are not easily defined. For many years algae were categorized as plants because of their ability to carry out photosynthesis. Later, the algae were placed within the diverse kingdom Protista (a group Edible algae being dried on a beach near Hisanohama in Fukushima ken (prefecture), Japan. H. Hodge 47 A closer look At BActerIA, AlgAe, And ProtozoA Algae, primarily diatoms, dinoflagellates, and coccolithophorids, Caption TK which are often collectively called phytoplankton, are the base of the food chain for all marine organisms.