Mark for Review Plant cells communicate with tissues by control chemicals known as hormones. Auxin, a plant hormone is
produced in the stem, buds, and root tips. Auxin moves to the darker side of a plant shoot promoting the
elongation of cells on that side. What system carries auxin to move to the darker side of the plant?
A) Dermal system
B) Immune system
C) Reproductive system
D) Vascular system

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.