Which algae family does kelp belong to?
a. blue-green algae
b. brown algae
c. green algae
d. yellow-red algae?

What two temperature scales do scientists use

Which statements best describe the atoms of the gas neon? check all that apply

Which example best describes a reflex action? a. eating food when hungry b. coughing when the throat is irritated c. bending down to lift a heavy object d. going for a walk outside