Question1. Fill in the blanks: (a) The main steps of nutrition in humans are __________, __________, __________, _________ and __________. Solution 1(a): The main steps of nutrition in humans are ___ingestion___, ___digestion___, ___absorption___, ___assimilation_ and __egestion__. (b) The largest gland in the human body is __________. Solution 1(b): The largest gland in the human …
Question1. Why do organisms take food? Solution1: Living organisms eat food to get energy, which is essential for performing growth and for the maintenance of their body. Question2. Distinguish between a parasite and a saprotroph. Solution2: Saprotroph Parasite These are the organism that takes nutrients from dead or decaying organic matter. These are the organism that grows …
Introduction We use water for our daily activities and make it dirty. Wastewater is the dirty water that goes down the drains from sinks, toilets, and laundries which is rich in lather, and mixed with oils. We can reuse this dirty water by removing pollutants from it. Demand for water is increasing day by day …
Introduction Forest gives us oxygen on a large scale. Forest purifies the air and water as it plays an important role to balance the water table. Forests and trees recharge the groundwater by absorbing the rainwater and groundwater. Cutting down trees and forests for our needs leads to a great disturbance in nature as it …
Introduction If you have water, you can think of the future. World water day is celebrated on 22nd March. Water is a very precious natural resource. On average 50L water is used per person for their daily activities like drinking, bathing, washing clothes and maintaining proper hygiene. The demand for water is increasing day by …
Introduction Reproduction is the production of new individuals from their parents. All living organism reproduce their young ones. In plants, there are different modes of reproduction.
Introduction All organisms need a continuous supply of food, water and oxygen for survival. They need to transport all these to various parts of their body. Also, animals need to transport wastes to parts from where they can be removed. I human beings’ the organs of the circulatory system are the heart, blood and blood …
Class 7 Chapter 11 Transportation in Animals and Plants Read More »
Introduction All living organisms respire to extract energy from food. Living organisms are composed of cells which are responsible to perform some functions like nutrition, excretion, reproduction and transport. Cells need energy derived from food to perform these functions. https://www.youtube.com/watch?v=mzk3gQ-qS7s&t=193s
Soil The uppermost layer of the earth’s crust where plants grow is called soil. Soil is a very important natural resource. Soil gives anchorage to plants and provides water and nutrients. It is essential for agriculture and is home to many organisms. Agriculture is the source of food, clothing and shelter. https://www.youtube.com/watch?v=F47oRR6QM5w&t=1s …
Introduction The day-to-day condition of the atmosphere at a place with respect to the temperature, humidity, rainfall, wind speed, etc., is called the weather at that place and time. The daily weather report available in newspapers and on news channels carries information about the temperature, humidity and rainfall during the past 24 hours. It also …
Class 7 Chapter 7 Weather, Climate and adaptations of animals to climate Read More »
