Can a complex organism interbreed with a simple organism?
<span>A) Phosphate groups, ribose sugar, adenine base</span>
<u>Which types of proteins help defend the body against foreign agents like bacteria?</u>
<u>antibodies</u><u> </u>
<u>it's</u><u> </u><u>simple</u><u>.</u><u>.</u><u>.</u>