Shampoos and hair often claim to have nutrients and vitamins your hair must have to grow and be healthy. a. what is the composition of the hair shaft onto which shampoos and conditioners are applied? b. taking into account the composition of the hair shafts, do you think these vitamins and nutrients will be beneficial? why or why not ?

The rate at which molecules water and oxygen can enter a cell is determined by the-

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.