Definition of supposititious. 1  1a : fraudulently substituted : spuriousb of a child (1) : falsely presented as a genuine heir (2) : illegitimate. 2  2 [influenced in meaning by supposition] a : imaginaryb : of the nature of or based on a supposition : hypothetical.
Mitochondria-Mitochondria are oblong shaped organelles that are found in the cytoplasm of every eukaryotic cell. In the animal cell, they are the main power generators, converting oxygen and nutrients into energy.nimal cells are typical of the eukaryotic cell, enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles.
Mitochondria and Energy. Mitochondria, an organelle found in both plant and animal cells, contains protein-rich components called cristae, which produce ATP. ATP is converted to adenosine diphosphate (ADP), a process which releases energy.denosine triphosphate (ATP) is a high-energy molecule contained in the nucleus of eukaryotic cells. This molecule provides all energy needed for various physiological processes, and is renewed through oxidation, so a cell always contains a supply of ATP to fuel the energy demands of the organism.