Page 5 - Science Class 07

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How Do Plants Get Their Food?

• Nutri on • Components of Food
• Modes of Nutri on • Autotrophic Nutri on
• Heterotrophic Nutri on • Saprophy c Nutri on
• Parasi c Nutri on • Symbio c Nutri on

• Insec vorous Nutri on

All green or non-green plants are living beings. swallowing it. The required amounts of the
They also need energy to carry on various life essen al nutrients differ by age and state of the
processes like respira on, excre on, move- body. For example, physical ac vity, diseases
ment, to respond to s muli and to grow. All present (e.g., prostate cancer, breast cancer or
living beings get energy from food and hence weakened bones – known as osteoporosis),
plants also get energy from food. But plants do medica ons, pregnancy and lacta on.
not take food as we take. They make their food Food
on their own.
Healthy food is one of the most important parts
Let’s discus various topics related to the in leading a healthy life. Combined with
nutri on in plants: physical ac vity, a balanced diet can help us to

NUTRITION reach and maintain a healthy weight. Healthy
Nutri on is defined as the process by which an food habits can reduce the risk of chronic
animal or plant takes in and u lises food diseases. It can also improve our concentra on
substances. Essen al nutrients include protein, and promotes our overall health.
carbohydrate, fat, vitamins, minerals and COMPONENTS OF FOOD

electrolytes. Normally, 85% of daily energy is Human beings eat cereals, pulses, fruits,
used in the form of fat and carbohydrates and vegetables, etc. Most of the ca le feed on
15% in the form of proteins. In humans, plants and plant products. Lions, gers, snakes,
nutri on is mainly achieved through the process fox, etc. eat flesh of other animals. Some
of pu ng food into our mouth, chewing and aqua c animals feed on marine plants while

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