AP BIOLOGY

Detailed explanation-1: -The understory is the layer above the forest floor. Much like the forest floor, only about 2-5 percent of the sunlight reaches this shadowy realm. Many of the plants in the understory have large, broad leaves to collect as much sunlight as possible.

Detailed explanation-2: -The canopy not only blocks out sunlight, but dampens wind and rain, so much so that a visitor to the rainforest may not immediately know it is raining because raindrops are deflected and collected by various canopy plants.

Detailed explanation-3: -Earth Floor: Biomes. Although tropical rainforests receive 12 hours of sunlight daily, less than 2% of that sunlight ever reaches the ground.

Detailed explanation-4: -The forest floor is the lowest layer where it is dark, hot, and damp. Only two per cent of sunlight gets through the thick canopy trees and understorey plants to reach the forest floor.

Detailed explanation-5: -This is because the leaves of the trees above are so dense that they block any sunlight from reaching the forest floor. As a result, it is dark and most plants do not receive enough light to perform photosynthesis, which is how plants make food out of water, carbon dioxide and sunlight.