Why is it important to check with your teacher or librarian before using an internet encyclopedia?

Is the universal urge to strive for perfection in order to overcome feelings of inferiority. a. pleasure principle b. striving for superiority c. collective unconscious d. reality principle

Which organisims can cause diseases a. micro organisims b. multicellular organisnims c. both d. neither

What property does soil or rock need to be permeable? a.)young b.)old c.)non porous d.)porosity