Author: MJ

TOPIC 1: GENETICS – Click to view TOPIC 2: EVOLUTION – Click to view TOPIC 3: RECEPTION, RESPONSE AND CO-ORDINATION IN PLANTS AND ANIMALS – Click to view TOPIC 4: SUPPORT AND MOVEMENT IN PLANTS AND ANIMALS – Click to Read More …

Concept of Growth and Development Growth is a characteristic feature of all living organisms. Most multicellular organisms start life as a single cell and gradually grow into complex organisms with many cells.  This involves multiplication of cells through the process Read More …

Introduction The process by which mature individuals produce offspring is called reproduction. Reproduction is a characteristic of all living organisms and prevents extinction of a species. There are two types of reproduction: sexual and asexual reproduction. Sexual reproduction involves the Read More …

Introduction Ecology is the study of organisms and their environment. All organisms show interdependence on one another. Organisms are affected by their environment, and they in turn affect the environment. Green plants manufacture food by photosynthesis which other organisms obtain Read More …

General Principles of Classification Classification is the science that puts organisms into distinct groups to make their study easy and systematic. Modern scientific classification is based on structure and functions. Organisms with similar anatomical and morphological characteristics are placed in Read More …

TOPIC 1 : CLASSIFICATION II – Click to view TOPIC 2 : ECOLOGY – Click to view TOPIC 3 : REPRODUCTION IN PLANTS AND ANIMALS – Click to view TOPIC 4 : GROWTH AND DEVELOPMENT – Click to view

PART I: EXCRETION Excretion is a process by which living organisms separate and eliminate waste products of metabolism from their bodies Metabolic wastes are toxic to cells if allowed to accumulate, and could also alter the normal conditions for cell Read More …

Definition: process by which food substances are chemically broken down in all living cells to release energy, carbon (IV) oxide and water or alcohol Tissue respiration takes place in mitochondria. These organelles occur in large numbers in cells of organs Read More …

Gaseous Exchange in Plants Gaseous exchange: process by which respiratory gases, O2 and CO2, are passed across the respiratory surface Concentration gradient existing btn the respiratory surface and the surrounding medium facilitates gaseous exchange The mechanism of exchange involves simple Read More …

Need for Transport carry required substances to body parts remove metabolic wastes from the body Lower organisms and simple multicellular organisms have small bodies that make them have a large surface area to volume ratio. Diffusion alone is enough to Read More …