ADAPTATION Adaptation is defined as the ability of an organism to live successfully in a particular habitat as a result of its structure, appearance and
Author: Mrs Nubi
Biological Association In a community, there exist different kinds of biological associations between organisms of different species. Some of these biological associations are beneficial, some
CONSERVATION OF NATURAL RESOURCES Definition: Conservation is defined as the planned, control exploitation or judicious use of natural resources to ensure their continuous availability and
POLLUTION Definition: Pollution is defined as the release of toxic or harmful substances into the environment by their natural forces or man and other animals
Nitrogen Cycle Nitrogen is an abundant element in the atmosphere. It is an essential constituent of proteins, a group of substances found in all living
Meaning Nutrient cycling refers to the movement of certain nutrients like nitrogen, carbon, water, oxygen and other elements from the environment into various organisms and
Introduction Food production depends on the following Role of government in agricultural production Environmental factors required for food production 3Ways of improving crop production
TERRESTRIAL HABITATS Organisms of the land are called terrestrial organisms. They include plants and animals that are found living on the ground and under the
HABITAT (AQUATIC HABITAT) Habitat is a place where organisms (plants, microorganisms and animals) are naturally found e. g. the habitat of tadpole is the bottom
DEVELOPMENT OF ZYGOTE IN FLOWERING PLANTS, GERMINATION OF SEEDS, ADAPTIVE FEATURES IN A DEVELOPING ANIMAL DEVELOPMENT OF ZYGOTE IN PLANTS Pollination is followed by fertilization
COURTSHIP BEHAVIOURS IN ANIMALS Courtship is a reproductive communication between males and females of a species that ends in sexual union. Courtship behaviours in animals
THE ORGAN OF HEARING Mammals have two ears on each side of the head. The greater part of it is enclosed in the skull for
SENSORY RECEPTORS All living organisms respond to changes in their environment (stimuli). These changes can be mechanical, electromagnetic, chemical or thermal. Though most cells in
REFLEX AND VOLUNTARY ACTIONS Actions are responses to stimuli. These actions are grouped into two: involuntary (reflex) and voluntary actions. REFLEX ACTIONS Reflex actions
THE PERIPHERAL NERVOUS SYSTEM These include the sensory system (receptor and nerves leading from all parts of the body to the CNS) and the motor
THE NERVOUS SYSTEM The nervous and hormonal systems co-ordinate various biological activities in the body of multicellular animals, the basic structural unit of nervous system
HORMONES AND ENDOCRINE GLANDS Hormones are chemical substances produced or secreted by endocrine glands (ductless glands) in response to various stimuli. Hormones are secreted into
STRUCTURE OF THE LIVER The liver is the largest organ in the body of a mammal with a weight of about 1.25kg. It is reddish
HOMEOSTASIS Homeostasis is the process by which a fairly constant internal environment is maintained in an organism. The internal environment of an organism is made