Answer:
Facilitated diffusion require no energy and travels down the gradient of concentration. On the other hand, active transport takes energy and travels up the gradient of concentration.
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I believe the answer to 11 is that multicellular organisms are made up of multiple cells and unicellular organisms are made up of one cell.
Optical nervous system pathway information travel from the eye
Tunica albuginea is the dense connective tissue <span>ʕ•ᴥ•ʔ</span>
