Biology notes free pdf

Teeth and Digestive System

Teeth and Digestive System Teeth They are produced in two sets - temporary and permanent.The teeth are four types : incisors, canines, premolars and molars.A tooth...

Respiratory System

Respiratory System Cellular respiration requires oxygen and produces carbon dioxide. Oxygen must be dissolved in water before animals can take it up. Therefore, the lung...

Plant Growth Hormones

Plant Growth Hormones Generally, there are five types of plant hormones, namely auxins, gibberellins (GAs), cytokinins, abscisic acid (ABA) and ethylene.Auxins, gibberellins, cytokinins are plant...

Plant kingdom

Plant Kingdom All organisms that make their own food are called plants. Plant kingdom is grouped into four major phyta, namely. Thallophyta (bacteria, fungi, lichens and...

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