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.
3. Plant and animals cells both contain vacuoles, but the vacuoles in plant cells are much larger than in animal cells. 4. Both plant and animal cells contain organelles called mitochondria that provide energy for the cell.However, plants also contain chloroplasts (generally in greater numbers than mitrochondria) that also produce energy for the cell, while animal cells do not.econd, the differences between eukaryotes like plant and animal cells and prokaryotes like bacteria are also important: 1. Prokaryotes generally do not contain membrane bound organelles such as mitochondria and chloroplasts, and instead produce their energy using proteins embedded in their plasma membrane.