Lava cools and it makes an igneous rock
Answer:
c. make a smear for a differential stain.
Explanation:
After isolating a pure culture it is necessary to inoculate the microorganism in a differential medium. Differential culture media enable the differentiation of microorganisms or groups of microorganisms. These media contain specific dyes or chemicals for growth of desired microorganisms.
Answer:
nucleus
Explanation:
Since the nucleus of the cell contains DNA (genetic material), she must focus on the nucleus.
4. The purpose of having a light source on a microscope is to allow better viewing.
Answer:
90,000
Explanation:
It would be 90,000 because it is a pattern, 90, 900, 9,000, and 90,000.