The planetary body that Spirit was designed to explore the wide ranges of soil and rocks for clues of the water activity on Mars. Spirit specifically landed at the Gusev Crater which was before, a possible lake in a giant crater.
The inches side because you measure things in inches when it's talking about length not cm unless you have to convert
A metallurgical microscope
That organisms are called CONSUMERS...
The answer is a. It’s the only one with a control group
