In response to a stimulus, a brain cell called a neuron will send a signal to the brain

a. respiration and absorption
b. myosin and actin
c. electrical signals and chemical neurotransmitters
d. contraction and relaxation

The production of cells during mitosis into specialized function is recombination or differentiation

Where in the cell are ribosomes made?

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures