Slate is composed of mineral quartz and muscovite or illite, it is usually joined by biotite, chlorite, hematite and pyrite.
An autotroph is an organism that makes food for itself like plants
Answer:
Iris Diaphragm controls the amount of light reaching the specimen. It is located above the condenser and below the stage. Most high quality microscopes include an Abbe condenser with an iris diaphragm. Combined, they control both the focus and quantity of light applied to the specimen.
Explanation:
