What component of the circulatory system is at tissue level

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes