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Why do Plants Lean Toward Sunlight?
Plants kept inside a room always grow in the direction of the window. In woodlands where there is a thick canopy of trees and sunlight rarely falls on earth, very few plants survive. Those that do, do not require sunlight to make their food. People have long wondered about this phenomenon until the answer was discovered and explained by the English naturalist Charles Darwin. He demonstrated that the growing shoot of a grass seedling always bends towards light....
Can Plants be Parasites?
All living things are dependent either on other animals or plants for their food. Animals must constantly go in search of food. But plants remain fixed at one place. Some plants make their own food by using energy from sunlight to convert carbon dioxide from the air and water from the soil to make sugar. Green leaves of the plants contain chlorophyll that carry out this process called photosynthesis. But a large number of plants are unable to produce their own food because of the absence of chlorophyll....
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