Which statement about stomach acid (HCl) is true?
It helps kill bacteria
It activates the enzyme pepsin
It can burn the lining of the esophagus
All of these are true

Fundamental emotions or emotions that are learned and are highly complex true or false

Which of the following supports the argument that viruses are nonliving? a) they are not cellular.b) their dna does not encode proteins.c) they have rna rather than dna.d) they do not evolve.

When is it most common for humans begin to develop a sense of self worth? a. adolescence b. early childhood c. infancy d. late childhood