This element is found in all living things. it is recycled when organisms die. it is transformed from on form to another through photoshythesis and cellular respiration . that element is a) carbon b) hydrogen c) nitrogen d) oxygen

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

I’m stuck on this question cuz i’m stupid sksksksk

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content