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.
All eukaryotic cells have within them a variety of different structures called organelles. Organelles are small and function much like organs function in a large organism.Some organelles are responsible for gathering cell energy, others for controlling cell activities.Plant cells have different organelles than animal cells but also share many also. They all have a large variety of sizes and functions and make life as we know if possible.ome organelles are responsible for gathering cell energy, others for controlling cell activities. Plant cells have different organelles than animal cells but also share many also. They all have a large variety of sizes and functions and make life as we know if possible.