Explain why organisms need enzymes to survive

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

What process allows for the development of haploid sex cells? mitosis meiosis fertilization pollination

What is the number of phosphates in an atp molecule