How much physical activity do children and trens need? A. 50 minutes at least twice a week

B. 50 minutes at least five days a week

C. 150 minutes a week

D 150 minutes at least five days a week

Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.