Which statement about microorganisms is true? a. they can all be seen with the naked eye. b. they are all multicellular. c. they are all capable of making their own food. d. they all exhibit different forms and sizes.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping

Which sets of mrna codons could genetically come for a protein with the following amino acid composition