What primarily makes up the cell membrane?

Describe one technique used to study cells at the molecular level and explain its principle.

A hypothesis is an explanation for a natural phenomenon based on repeated observations. 

Which type of bond is formed when one atom donates an electron to another?

Which level of biological organization includes all populations in a specific area?

Describe the shared properties that make something “alive”?

All living organisms are made up of cells.

The atom is the smallest and most fundamental unit of matter that retains the properties of an element.

Water is an excellent solvent for polar substances.

The hydrogen bonds in water give it a high surface tension.