David observes human epithelial cells under a microscope. He uses the ×40 objective lens and measures the diameter of a cell at 8 O. U. Using the same calibration table
above, calculate the diameter measurement to um?

Explain how organisms could be harmed by high levels of salt from roadways?

This rapid change in species that rarely leaves behind fossil evidence is referred to as

What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root