Properties of Genetic Material: Have you ever wondered why we look like our parents or grandparents? This is due to something that is being transferred from one generation to another. But what is that? We have the materials inside us, right now, to unlock the story of our deep, distant ancestry. That is the genetic
Structure of Blood Vessels: It is well known that the heart pumps blood to all parts of the body. But how does this blood reach each part of the body? It is by one of the blood vessels called arteries that carry oxygenated blood to all parts of the body. Here the blood pressure is
Digestive Enzymes: How does only eating serves the purpose of us growing strong and healthy? Because rest work is done by our digestive system. In the human digestive system, different chemical reactions and processes occur. But what controls these reactions? Digestive enzymes present in our digestive system are essential for digestion because they help speed
Plant Tissues: We know that green parts of a plant make their own food with the help of photosynthesis. Then how is this prepared food translocated to all parts of the plant body? How the water absorbed from roots is transported to all parts of the plant? Plants remain at one place fixed through their
Reflex Action: Do you know what will happen if we do not immediately remove our hand from the pointed needle or hot burned pan? Of course, it will get pricked or burned. But one of the parts of the nervous system controls actions that need an immediate reaction. It is the spinal cord that meets
Hormones in Humans: Control and coordination are very important for the normal functioning of the body. For this, two types of systems have been developed in our body, i.e., the nervous system and the endocrine system. Our nervous control is very fast, but its action is short-lived, and nerve fibres of this system cannot innervate
Stomatal Transpiration: We, humans, excrete the excess water of our body through urine, sweat etc. Similarly, plants have a special mechanism called transpiration for removing excess water. Transpiration is also called a necessary evil. Although maximum water gets lost from the plant body through this process, it is a necessary event for the plants themselves.
Significance of Transpiration: Do you know plants also cool their surface when the temperature is high? They also contribute to the water cycle. Humans aren’t the only living things that sweat to lower their body temperature. When trees and plants “sweat,” they cool themselves and their surrounding air by the process of transpiration. The plants
Significance of Photosynthesis: At least half of the oxygen produced on earth comes from the ocean via phytoplankton photosynthesis, and the other half is produced by photosynthesis on land from trees, shrubs, grasses, and other plants. Oxygen is the byproduct of photosynthesis, which is released into the atmosphere through tiny openings in the leaves called stomata.
Modern Synthetic Theory of Evolution: What animals did humans evolve from? Do you know how life evolved from a simple single cell to a complex multicellular organism? Many scientists came forward and gave their thoughts and formulated a theory for evolution, but the most accepted theory is the Modern synthetic theory of evolution. This theory