Question

notes for science class 7th ncert ch 2​

Answer 1

Answer:

Various modes of feeding in different Animals

Name of the animal Kinds of food Modes of feeding

Snail Algae Scraping from rocks

Ant Plant material and other animals Biting and chewing

Eagle Flesh of prey Tearing

Humming Bird Nectar from flower Sucking

Lice Blood from the skin of scalp Sucking

Mosquito Blood from animals Sucking

Butterfly Nectar from flower Syphoning

Housefly Filth and refuses Sucking

Amoeba Tiny aquatic animals Capturing and Swallowing

Snake (Python) Animal as a whole Swallowing

Explanation:

Nutrition in Animals Class 7 Notes Science Chapter 2

April 23, 2019 by Sastry CBSE

CBSE Class 7 Science Notes Chapter 2 Nutrition in Animals Pdf free download is part of Class 7 Science Notes for Quick Revision. Here we have given NCERT Class 7 Science Notes Chapter 2 Nutrition in Animals.

CBSE Class 7 Science Notes Chapter 2 Nutrition in Animals

All animals require food for obtaining energy, growth, repair of damaged parts and functioning of the body. The process of taking food by an animal and its utilisation in the body is called animal nutrition.

Plants can prepare their own food by the process of photosynthesis but animals get their food from plants, either directly by eating plants or indirectly by eating other animals that eat plants. Some animals eat both plants and other animals.

Animal nutrition includes nutrient requirements mode of intake of food and its utilisation in the body.

The components of food such as carbohydrates are complex substances which cannot be utilised by the body. So, they are broken down into simpler substances. The process of breakdown of complex components of food into simpler substances is called digestion. There are two methods of digesting food, i.e. physical method (including chewing and grinding of food in mouth) and chemical method (addition of digestive juices to the food by the body itself).

Different Ways of Taking Food

Different types of animals show different modes of nutrition. Some animals filter tiny food particles and feed upon them, while some swollen the animals they prey upon. The mode of nutrition in different animals depends upon the special structure or organ for taking food inside the body.