Pls write 8 sentence and I will mark brainlest if correct

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

Which flexible structure that supports the nerve cord and led to the backbone