I am guessing an Ecological Relationship as it is dependent on it's environment
Answer:
a) Robert Hooke
Explanation:
The cell was first discovered by Robert Hooke in 1665, which can be found to be described in his book Micrographia. In this book, he gave 60 'observations' in detail of various objects under a coarse, compound microscope.
Answer:
Na2He
Explanation:
This is the correct answer
I'm not quite sure, but i believe that you are already simplified. There are only ten millimeters per centimeter, so if its only to the tenth, its already simplified. Sorry if this is not much help, or if its wrong, I'm not the brightest crayon in the box.