What is the osmolarity of the kidney moving from the cortex to the medulla

When using the scientist method, which step comes last?

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.

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine