Never in contact with the external environment A. Epithelium
B. Connective
C. Muscular
D. Nervous
E. Description applies to more than one class of tissue

(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.

Reactants undergo chemical reaction to form products. this chemical equation represents one such reaction. the coefficient for one of the reactants or products is incorrect. which part of the chemical equation is incorrect?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above