Ascientist in a lab looks under a microscope at muscle tissue and makes a few observations on what he notices. looking at the signs his observations below which one best supports cell theory?

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

What is the term for the two sets of chromatids formed in the parent cell a. haploid b. diploid c. gamete d. tetrad

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?