Why Are Plants Exposed To Light

Why did plants exposed to no light grow better than the plants exposed to light? The plants exposed to no light performed better than those exposed to light is most likely caused by the plants exposed to no light having more water than those in light. Even though the amount and frequency of water added to all plants were kept the same, the amount of water the plants in no light had access to was more than the amount of water the plants in light had. This is due to two reasons: a) because the plants exposed to no light, the sun couldn't evaporate water from the plant, and b) the plastic container placed on top of the plant trapped and contained what little water did evaporate, therefore letting the plants reuse water that was given to it.
Why did the plants exposed to no light look less healthy than those exposed to light? The sickly pale color seen in plants 4, 5, and 6 is most likely attributed to the fact that, without sunlight, plants are not able to create sugars to nourish itself. Sugar is vital for the healthy
The three main theories as to how xylem transports water and minerals are root pressure, capillary action, and cohesion-tension/transport pull. The root pressure theory works by the water being pumped into xylem tissue. Then, the minerals and ions absorbed with the water then get pumped up the root. The water then follows the ions and minerals up the xylem, and throughout the plant. Capillary action works by relying on the adhesive properties of water. Because the polarity of the capillary walls attracts water molecules, water sticks to the sides of the tube, therefore, causing the water to move up the tube. Cohesion-tension or transpiration pull works by the water from the leaves being evaporated caused by the heat of the sun. This then causes a change in pressure which moves the water up from the