Is there water in mars or in the moon

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

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

The transport tubes for food coming down the plants are called?