NCERT & CBSE Class 7 Science Nutrition in Plants Notes
In this article, we are going to share some facts about nutrition in plants and modes of nutrition. Nutrition in plants is the first chapter of CBSE Class 7 science. In class 6 you have learnt about how food is essential for all living beings.
Plants can make their food themselves but animals including humans cannot. Humans are directly or indirectly depended on plants and animals. Carbohydrates, proteins, fats, vitamins, and minerals are components of food. And these components are necessary for our body and are called Nutrients.
Modes of Nutrition in Plants
Nutrition is the mode of taking food by an organism and its utilisation by the body. Nutrients in the food enable living organisms to build their bodies, to grow, to repair damaged parts of their bodies and provides the energy to carry out life processes.
Autotrophic Nutrition–means self-nourishment. The mode of nutrition in which organisms make food themselves from simple substances is called autotrophic nutrition. And plants known as Autotrophs.
Heterotrophs – Animals and most living organisms take in readymade food prepared by the plants. They are called heterotrophs.
Photosynthesis (Photo=light, synthesis=to combine) – Food making process in Plants
Leaves are the food factories of plants. The synthesis of food in plants occurs in leaves. Water and minerals present in the soil are absorbed by the roots and transported to the leaves. Carbon dioxide from air is taken in through the tiny pores present in the surface of leaves. These pores are surrounded by ‘guard cells’. Such pores are called stomata. Water and minerals are transported to the leaves by the vessels throughout the root, the stem, the branches and the leaves. The leaves HAVE A GREEN PIGMENT CALLED CHLOROPHYLL. IT HELPS leaves to capture the energy of the sunlight. This energy is used to prepare food from carbon dioxide and water. The process of preparing food occurs in the presence of sunlight, it is called Photosynthesis.
Sun is the ultimate source of energy for all living organisms
For more explanation, watch CBSE class 7 Science Photosynthesis video. For complete syllabus Register with us and enjoy learning through simulation and flash cards along with 2D animated videos. Takshila Learning also provides CBSE class 7 Science NCERT solutions of entire syllabus.
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