for question 1.) i am pretty sure of answer a.)
for question 2.) the answer is most likely b.)
i would recommend waiting for a second opinion. just to be safe.
Answer:
chemistry is basically the study of matter and their properties. it also it also explains how and why some substances combine or separate to form different substances.
Preventing ph changes caused by the rising and falling pco2 of the plasma
Answer:
Compound
Explanation:
everything else only produces a single image also I've used compound microscopes to observe living things