Which of the following statements is true? water is the energy source for plant photosynthesis. chlorophyll is contained in organelles called mitochondria. a by-product of photosynthesis is carbon dioxide. roots have tiny root hairs that maximize the plant's ability to absorb water.

The correct statement is that root hairs maximize the ability of the plant to absorb more water.

The root hairs are tiny, hair-like compositions, which arise on the surface of the plant roots. Their prime function is to enhance the area accessible for water absorption and that of nutrients and other minerals. The root hairs are delicate compositions, which can only thrive for a few days. They do not possess the tendency to convert into roots.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.