<span>A) mitochondria and chloroplasts both have prokaryotic ribosomes is the answer</span>
The goal was to see if Earth's ecosystems could be successfully manufactured and maintained elsewhere in the galaxy, should we need to bail on this planet.
It was named Biosphere 2 because it was meant to be the second fully self-sufficient biosphere, after the Earth itself
To have the information to form proteins
<span>One of the reasons PCB's have been hard to clean up from the puget sound is because they stay in the food chain. Once something is inside an animal it becomes much harder to remove from the environment than if it was just in water.</span>
Because genetic variation<span> helps organisms </span>survive<span> in different climates and environments.
Hope it helped!</span>