Explain what the microscope user may have to do to combat the problems incurring when the field of view is decreasing

Which of the following is not a product of the second stage of glycosis

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

What are 3 reasons that natural selection occurs