All animals and plants require nutrition, light, air, and water to grow. Photosynthesis is a chemical process in which the green plants manufacture food for their growth and survival. Unlike animals, plants can make their own energy. Plants form the basic link in a food chain.
Animals feed on other animals or these plants to get their energy. Additionally, animals also require water to make energy. They, therefore, take the second place in a food chain. However, some animals such as camel can survive for several days without water. During this period, the camel obtains water by breaking down the stored lipids and fats to produce metabolic water. Camels are specially adapted since they live in the desert where water is scarce.
How plants get food
Plants can manufacture their own food and do not feed on other organisms. However, there are some plants like the carnivorous plants which feed on other organisms. They trap insects and then absorb nutrients and energy from them. They have digestive juices which help in converting the trapped insects into nutrients.
Plants absorb water and nutrients from the soil through their roots. There are some plants which have developed other means of absorbing nutrients and water. For instance, some have funnel-shaped containers to trap water with their leaves.
What happens when plants are kept in darkness?
Plants are known for shedding their leaves and finally die when there is no light. It is only the stems and roots that are left. Plants need light to make food, and they, therefore, grow very slowly in winters and at night when the light is limited.
Animals also depend on light though there are some which are adapted for dark habitats such as the moles which live beneath the soil surface. Human beings require sunlight since it helps in the production of vitamin D by the skin. This vitamin is needed in high amounts for building healthy and strong bones.
What is photosynthesis?
Photosynthesis is the process by which the green plants manufacture food. It takes place in the chloroplasts. The requirements for this process are water, sunlight and carbon dioxide. Water is absorbed from the soil by the plant’s roots while both air and carbon dioxide are absorbed from the atmosphere through the stomata.
Stomata are the tiny pores located on the leaf especially n the lower sides. They are located on the lower side to minimize water loss by evaporation. Water and carbon dioxide are then broken down into their constituents elements.These elements include oxygen, carbon, and hydrogen in the presence of sunlight and chlorophyll. Glucose is then formed, and oxygen is released as a by-product. This oxygen is released to the atmosphere.