Movement is one of the significant features of living beings. Animals and plants exhibit a wide range of movements. Streaming of protoplasm in the unicellular organisms like Amoeba is a simple form of movement. Movement of cilia, flagella and tentacles are shown by many organisms. Human beings can move limbs, jaws, eyelids, tongue, etc. Some […]
LOCOMOTION AND MOVEMENT | NCERT | BIOLOGY CHAPTER 17 Read More »
Animals accumulate ammonia, urea, uric acid, carbon dioxide, water and ions like Na+, K+, Cl–, phosphate, sulphate, etc., either by metabolic activities or by other means like excess ingestion. These substances have to be removed totally or partially. In this chapter, you will learn the mechanisms of elimination of these substances with special emphasis on
Excretory Products and their Elimination | NCERT | BIOLOGY CHAPTER 16 Read More »
You have learnt that all living cells have to be provided with nutrients, O2 and other essential substances. Also, the waste or harmful substances produced, have to be removed continuously for healthy functioning of tissues. It is therefore, essential to have efficient mechanisms for the movement of these substances to the cells and from the
BODY FLUIDS AND CIRCULATION | NCERT | BIOLOGY CHAPTER 15 Read More »
As you have read earlier, oxygen (O2) is utilised by the organisms to indirectly break down simple molecules like glucose, amino acids, fatty acids, etc., to derive energy to perform various activities. Carbon dioxide (CO2) which is harmful is also released during the above catabolic reactions. It is, therefore, evident that O2 has to be
Breathing and Exchange of Gases | NCERT | BIOLOGY CHAPTER 14 Read More »
Dolphins, known for their intelligence and playful nature, often exhibit the intriguing behavior of swimming in front of ships. This phenomenon has captivated the attention of sailors, marine biologists, and ocean enthusiasts alike. Dolphins swim in front of ships for several reasons: 1. Hydrodynamic Efficiency One of the primary reasons dolphins swim in front of
Why Do Dolphins Swim in Front of Ships? Read More »
You have already studied the organisation of a flowering plant in Chapter 5. Have you ever thought about where and how the structures like roots, stems, leaves, flowers, fruits and seeds arise and that too in an orderly sequence? You are, by now, aware of the terms seed, seedling, plantlet, mature plant. You have also
Plant Growth and Development | NCERT | BIOLOGY CHAPTER 13 Read More »
Electrofishing is a widely used technique in aquatic research and fisheries management, leveraging the principles of electricity to temporarily immobilize fish for easy capture and study. This method has revolutionized the way scientists and conservationists gather data on fish populations, monitor ecosystem health, and manage aquatic resources. Below, we delve into the intricacies of electrofishing,
Electrofishing: A Modern Technique for Aquatic Research and Management Read More »
“The Simpsons” is an iconic American animated sitcom created by Matt Groening. It premiered on December 17, 1989, on the Fox network and has since become the longest-running American sitcom and animated program. The show is set in the fictional town of Springfield and satirizes American culture, society, and television. Main Characters Supporting Characters The
The Simpsons Predictions That Will Blow Your Mind Read More »
All of us breathe to live, but why is breathing so essential to life? What happens when we breathe? Also, do all living organisms, including plants and microbes, breathe? If so, how? All living organisms need energy for carrying out daily life activities, be it absorption, transport, movement, reproduction or even breathing. Where does all
RESPIRATION IN PLANTS | NCERT | BIOLOGY CHAPTER 12 Read More »
All animals including human beings depend on plants for their food. Have you ever wondered from where plants get their food? Green plants, in fact, have to make or rather synthesise the food they need and all other organisms depend on them for their needs. The green plants make or rather synthesise the food they
PHOTOSYNTHESIS IN HIGHER PLANTS | NCERT | BIOLOGY CHAPTER 11 Read More »
