Do platyhelminthes have an entoderm

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

What is the next step in muscle contraction after the actin changes shape? (apex)

Ecology can best be described as the study of what