Some athletes use "blood doping," adding additional red blood cells to the blood, to achieve a competitive edge. the extra red blood cells will

Give the biological term for: structures that display characteristics of living organisms only within living cells

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to

Glycogen is an energy-storage molecule in humans. a hormone that is called insulin controls the storage of glycogen in the liver. insulin is made up of amino acids.