What is movement? Movement is an attempt by living organisms to use changes in their environment to their advantage. For example, Buffaloes chew cud to help break up tough food to digest it better. Such movements have to be controlled. In multicellular organisms, specialised tissues are used to provide these control and coordination activities. In…
Life Process refers to a series of Actions that are essential to determine if an animal is alive. These are movement, reproduction, sensitivity, nutrition, excretion, respiration and growth (MRS GREN). These processes are essential to sustain life. They do the job of maintaining cells/organisms. Variegated leaves: yellowing of leaves naturally: parts of leaves contain chlorophyll…
A group of cells that are similar in structure and/or work together to achieve a particular function forms a tissue. Plant Tissues: Plant tissues can be of two types: Meristematic Tissue (dividing tissue) and Permanent Tissue. Meristematic Tissue: Dividing tissue – growth tissue. Depending on where it is present it is classified as: Apical: Present…
Changes in Adolescence The transition phase between childhood (phase of internal growth) and sexual maturity is known as adolescence. During this phase, the body proportions change, and new features and new sensations appear. Some changes are common in boys and girls: Thick hairs in new parts of the body: Armpits and the genital area between…
Reproduction refers to the process of replication of an individual organism from parent to child. The tale of reproduction starts with cell division. Cell division Chromosomes contain information for the inheritance of features from parents to the next generation in the form of DNA (Deoxyribonucleic Acid) molecules. DNA in the cell nucleus is the information…
In Biology, a Cell is a basic membrane-bound unit that contains the fundamental molecules of life. It is the fundamental unit of life, i.e. all life form is composed of cells. What is Life? The Question of what is life is not centred around what living things have, it is what they do. We find…
