Crocodiles and alligators are both reptiles from the same order of animals, named Crocodylia. There are however a number of important differences which set these apex predators apart *Crocodiles have a longer, more V-shaped head then alligators.
*The fourth tooth of a crocodile sticks out when its mouth is closed.
*Crocodiles are better adapted to living in seawater.
*Crocodiles are more aggressive than alligators.
*Crocodiles tend to have a lighter appearance than alligators.
*Crocodiles in the wild are found all over the world while alligators are only found in the US and China.
Mitochrondria of the eukaryotic cells.
<span>As many researchers hypothesize that the old single-celled organism or the origin of the complex-celled organisms came from the endosymbiosis of the mitochrondrion organism and the prokaryotic cell. It has been said that mitochondria was an independent organism which then to have been evovled itself after planting itself inside a prokaryotic cell which aided cellular respiration and production of ATP (Adenosine Triphosphate). This then aided the prokaryotic cell to be more sophisticated and caused another change from having without a true nucleus to a eukaryotic cell with a nucleus and embedded DNA. </span>
The answer that I had think it is c.
The Rhizobium or Bradyrhizobium bacteria colonize the host plant's root system and cause the roots to form nodules to house the bacteria. The bacteria then begin to fix the nitrogen required by the plant.
