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Diagram showing the alternation of generations between a diploid sporophyte (bottom) and a haploid gametophyte (top) A sporophyte (/ ˈ s p ɔːr. ə ˌ f aɪ t /) is the diploid multicellular stage in the life cycle of a plant or alga which produces asexual spores.
In botany, a sporophyll is a leaf that bears sporangia. Both microphylls and megaphylls can be sporophylls. In heterosporous plants, sporophylls (whether they are microphylls or megaphylls) bear either megasporangia and thus are called megasporophylls , or microsporangia and are called microsporophylls .
Venenivibrio stagnispumantis gains energy by oxidizing hydrogen gas.. In biochemistry, chemosynthesis is the biological conversion of one or more carbon-containing molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic compounds (e.g., hydrogen gas, hydrogen sulfide) or ferrous ions as a source of energy, rather than sunlight, as in ...
The term spore derives from the ancient Greek word σπορά spora, meaning "seed, sowing", related to σπόρος sporos, "sowing", and σπείρειν speirein, "to sow".
The bacteriorhodopsin changes its configuration in response to sunlight, acting as a proton pump. This produces a proton gradient more directly, which is then converted to chemical energy. The process does not involve carbon dioxide fixation and does not release oxygen, and seems to have evolved separately from the more common types of ...
Any of a variety of different chemical pigments in chloroplast s that are essential for photosynthesis. chloroplast An organelle present in plant cells which contains chlorophyll. chlorosis An abnormal lack or paleness of color in a normally green organ. cilia. sing. cilium; adj. ciliate
Water-splitting process: Electron transport and regulation. The first level ( A ) shows the original Kok model of the S-states cycling, the second level ( B ) shows the link between the electron transport (S-states advancement) and the relaxation process of the intermediate S-states ([YzSn], n=0,1,2,3) formation
The biosynthetic pathway of the strigolactones has not been fully elucidated, but different steps have been identified, including the required enzymes to carry out the chemical transformation. [6] The first step is the isomerization of the 9th chemical bond of the -carotene, changing from trans configuration to cis. [6]