Which organ helps a child develop immunity? the thyroid
the thymus
the pancreas
the ovaries

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Which statement about the pancreas is not true? a. it is an endocrine organ in the abdomen. b. it release chemicals into the digestive system. c. it releases insulin to increase glucose levels. d. it release hormones into the bloodstream.

Which event would lead to primary succession of a forest?