A. Nutrients and other materials pass through the cell membrane through the process of diffusion. This allows the cell to perform all the activities it requires for daily maintenance and living. The concentration gradient allows the cell to regulate just how much of a certain material passes through it.
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I wish I could help but do not understand one bit like I am lost right now my brain is dead I can't get one thing you write
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limbs form the baby has fingers, hands,arms, feet and toes. they can now open and close their fists and mouth
The enthal difference between the reactants and the products is equal to the amount of energy released to the surroundings. ... A reaction in which energy is absorbed from the surroundings is called an endothermic reaction. In endothermic reactions the enthalpy of the products is greater than the enthalpy of the reactants.
