what are akinetes and heterocysts?
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An akinete is an enveloped, thick-walled, non-motile, dormant cell formed by filamentous, heterocyst-forming cyanobacteria under the order Nostocales and Stigonematales. Akinetes are resistant to cold and desiccation. ... In comparison to vegetative cells, akinetes are generally larger.
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Oscillatoria annae include unicellular, colonial and filamentous forms some filamentous cyanophytes form differentiated cells called heterocyst, that are speciallized for hydrogen fixation, and resting or spore cells called aconites.
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Polycystic kidney disease (PKD) is an inherited disorder in which clusters of cysts develop primarily within your kidneys, causing your kidneys to enlarge and lose function over time. Cysts are noncancerous round sacs containing fluid. The cysts vary in size, and they can grow very large.
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Roundworms, also known as nematodes, are a common term for parasites that comprise the phylum Nematoda that contain mainly free-living species and are located everywhere on earth. Roundworms are not ringworm, which is a fungal infection.
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Archaebacteria, eubacteria and cyanobacteria are the three domains of kingdom monera. Archaebacteria are called ancient bacteria whereas the eubacteria are called true bacteria. Eubacteria are usually found in soil, water, living in and on of large organisms.
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Cysts are abnormal, fluid-filled sacs that can develop in tissues in any part of the body. They are relatively common, and there are many different types. Infections, tumors, parasites, and injuries can cause cysts. They are usually noncancerous.
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Coelenterata is a term encompassing the animal phyla Cnidaria (coral animals, true jellies, sea anemones, sea pens, and their allies) and Ctenophora (comb jellies).
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Amoebas are heterotrophic. Amoebas are single-celled organisms that are distinguished by the formation of pseudopodia, or cellular projections used...
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Nematocysts are specialized stinging cells specific to Coelenterates that act as organs of offense and defense. They are cell organelles which are found in specialized cells called as cnidocytes or cnidoblasts, which are modified epidermal interstitial cells.
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Kidney cyst Kidney cysts are round pouches of fluid that form on or in the kidneys. Kidney cysts can be associated with serious disorders that may impair kidney function. But more commonly, kidney cysts are a type called simple kidney cysts — noncancerous cysts that rarely cause complications.
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Cells with cilia move fast! One unicellular organism that moves with cilia is the paramecium. Some unicellular organisms are able to change their shapes. Amoebas are "shape-shifters" that can extend parts of themselves into what are called pseudopodia and then flow in the direction in which they wish to go.
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Nabothian cysts are a normal finding on the cervix of women who have had children. They also are seen in menopausal women whose cervical skin has thinned with age. Less often, nabothian cysts are related to chronic cervicitis, a long-term infection of the cervix.
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Segmented worms have a well-developed body cavity filled with fluid, which serves as a hydroskeleton, a supportive structure that helps move the worm's muscles. Segmented worms also tend to have organ systems that are more developed than the roundworms or flatworms.
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There are two types of cysts: simple cysts and polycystic kidney disease. Simple cysts are individual cysts that form on the kidneys. They have thin walls and contain a water-like fluid.
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Paramecia are single-celled protists that are naturally found in aquatic habitats. They are typically oblong or slipper-shaped and are covered with short hairy structures called cilia.
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Answer and Explanation: Amoebas are heterotrophic. Amoebas are single-celled organisms that are distinguished by the formation of pseudopodia, or cellular projections used...
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The vegetative cells carry out photosynthesis and that is why cyanobacteria were called blue-green algae in the first place. Heterocysts fix atmospheric nitrogen, something the vegetative cells cannot do. ... But they are dead end cells: unlike their vegetative counterparts they can no longer multiply.