The ileum contains that project into the lumen and increase the amount of surface area.

What are the four basic classes of organic molecules how do they differ structurally and functionally

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Would really appreciate it, i have an idea but not completely sure