What does a Cell Biologist study?

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more