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Once a heterocyst has formed it cannot revert to a vegetative cell. Certain heterocyst-forming bacteria can differentiate into spore-like cells called akinetes or motile cells called hormogonia, making them the most phenotypically versatile of all prokaryotes.
The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. [a] [b] Publishers purchase or receive ISBNs from an affiliate of the International ISBN Agency. [2] A different ISBN is assigned to each separate edition and variation of a publication, but not to a simple reprinting of an ...
Intercalary located akinete of Dolichospermum smithii Terminally located akinete of Gloeotrichia Akinetes, also termed "cysts", of Haematococcus. An akinete is an enveloped, thick-walled, non-motile, dormant cell formed by both cyanobacteria and algae.
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The Meaning of It All: Thoughts of a Citizen Scientist is a non-fiction book by the Nobel Prize-winning physicist Richard Feynman. It is a collection of three previously unpublished public lectures given by Feynman in 1963. [1] The book was first published in hardcover in 1998, ten years after Feynman's death, by Addison–Wesley.
Spherical colonies of radiating straight trichomes (filaments without sheaths). Each trichome has an akinete as the basal cell near the center of the colony. Akinetes if present are adjacent the heterocyst. The primary morphology is trichomous (filamentous without sheaths), the secondary is colonial. The mucilaginous sheath is top short at the ...
Indicia, from the plural of the Latin word indicium meaning distinguishing marks, [1] is a piece of text in a magazine or comic book, traditionally appearing on the first recto page after the cover, which usually contains the official name of the publication, its publication date, issue number, information regarding editorial governance of the publication, and a disclaimer regarding ...
Auxospores are involved in re-establishing the normal size in diatoms, as successive mitotic cell divisions leads to a decrease in cell size. This occurs because each daughter cell produced by cell division inherits one of the two valves that make up the frustule (a silica cell wall), and then grows a smaller valve within it.