Scientists must use microscopes to study the cells of living things. Microscopes have become much more powerful since scientists used them to develop the cell theory. Explain why microscopes are needed to study cells. Also describe some discoveries that microscopes have helped scientists make about cells. Include how advances in microscopes have helped scientists make these discoveries

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

i believe the answer is 5,000