Its explain why mitochondria in animals and plastids in plants have its own DNA and double membrane. The theory postulates that this is due to a symbiotic relationship that began with the history of life when protists probably engulfed bacteria (most probably by phagocytosis). The bacteria offered energy while it was sheltered. The relationship evolved to become facultative.
If vehicles are made from plastic or ceramic, they will not stand up very well in collisions. Just think about a car lying in the side road destroyed pieces like a dropped ceramic object. Utilizing metal as the main body for the vehicle was purposefully and adequately chosen, but not all may think about why the element metal is such a right choice.
Food chains are for example something that another thing eats and it goes down to many different selections and starts off big and vies to small things
The answer should be D because if thats one of your answers on your tests and you missed it, then i would recemend studing. D is the answer because if organisms die, then new ones grow.