. Amirah and her sister have entirely different features and traits. Amirah has blond hair and brown eyes, but her sister has red hair and blue eyes. What causes variations in traits like hair color, eye color, and height?

im not in connections yet but i might can you some questions. what grade are you in?

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.