Which statement is true?
a. lipids are a type of fat.
b. fats are a type of lipid.
c. fats and lipids are separate and unrelated substances.
d. all lipids are fats, and all fats are lipids.

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles

What type of competition exsist between two species. turtles and fish