Why is collagen classified as a protein? a: it is found in a tissue. b: it is made up of amino acids. c: it is made up of twisted chains. d: it is found throughout the human body.

Which of the following statements about brain development and early childhood is true? the brain of a 5 year old is 60 percent the size of an adult brain the overall size of the brain does not increase dramatically from ages 3-15 by the time a child is 3 years of age, the brain is 25 percent of it's adult size the development that occurs inside the brain ends at the onset of adolescence