Day: December 29, 2022

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 …

TOPIC 1 : TRANSPORT IN PLANTS AND ANIMALS – Click to view TOPIC 2 : GASEOUS EXCHANGE – Click to view TOPIC 3 : RESPIRATION – Click to view TOPIC 4 : EXCRETION AND HOMOESTASIS – Click to view