Which one of these is not a reason that cells require the ability to diffuse materials across their membranes? a. no energy is required for this process b. water and oxygen are obtained this way c. to maintain homeostasis or balance d. to move carrier proteins

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

Many body systems work together for proper functioning of the body and to maintain internal homeostasis. the works to break down food eaten before exercising. the takes in the nutrients obtained from the food. the body sweats as a mechanism to cool off, because the is working to flush out toxins.