Type the correct answer in the box. What is the benefit of introducing one food at a time to a toddler?
By introducing one food at a time, a parent can determine if the child has any food

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.

lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. so they expose rocks