David observes human epithelial cells under a microscope. He uses the x40 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?

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.