THE TROPICAL DESERT AND TEMPERATE DESERT
Distribution Deserts are regions of scanty rainfall which may be hot like the hot deserts…
SHOOT SYSTEM
This is the part of the plant which grows above the soil except the modified…
ROOT SYSTEM
The root system is the part of the plant growing in the soil. This excludes…
EXTERNAL FEATURES OF FLOWERING PLANTS
The flowering plants form a group of plants known as Angiosperms. They are characterized by…
PRIMATES
Primates are the most highly developed of all mammals with large brain, forward-facing eyes with…
LAND AND SEA BREEZES AND MONSOONS
Land and sea breezes are, in fact, monsoons on a smaller scale. Both are basically…
THE ORIGIN OF VOLCANOES
The ancient Greeks believed the volcanic eruptions occurred when Vulcan, the God of Fire, stoked…
THE STRUCTURE OF MAMMALIAN GAMETES
The mammalian gametes are male gametes called sperm or spermatozoa (singular = spermato-zoon), while the…
GERMINATION
Germination is a process by which the embryo of a seed grows out of its…
PHYSICAL SETTING OF AFRICA
The physical setting of Africa is defined by its relief, drainage, climate and vegetation, among…
PARTURITION OR CHILD BIRTH
Parturition (labour) is the expulsion of the foetus, placenta and foetal membranes from the uterus….
EXTRAEMBRYONIC MEMBRANES
When the embryo has been implanted, it produces four extraembryonic membranes (membranes outside the body…
INDUSTRIAL ENTERPRISE IN NIGERIA
Industrial enterprise in Nigeria can be broadly classified into (i) local arts and craft, and…
IDENTIFICATION OF RELIEF FEATURES USING THEIR CONTOUR FORMS
It is possible to identify specific relief features on topographical maps by examining the way…
LIVER
The liver is the largest gland in the body. It is dark-red, spongy and lobed….
STOMACH
The stomach is a thick-walled large muscular sac which lies in the left portion of…
EXPERIMENTS TO SHOW THE CHARACTERISTICS OF ENZYMES
Experiment 1 Aim: To demostrate the action of ptyalin (saliva) on cooked starch. Method: Some…
SEX DETERMINATION
Genetic traits are determined by genes located on the chromosomes. The sex of an organism…
POLLUTION OF WATER RESOURCES
Man cannot survive without water. The low population densities in the desert natural region is…
THE COURSE OF A RIVER
A river will cut back and lower the land surface over which it is flowing,…
THE WATER CYCLE AND DEVELOPMENT OF A RIVER SYSTEM
The water is ever moving round between the atmosphere, the land and sea through a…
THE PROCESSES OF RIVER EROSION
The power or energy of a river depends essentially on its volume and its velocity….
FRACTURE AND DISLOCATION
A fracture is any break in a bone. There are two kinds of fracture namely…
STRUCTURE AND FUNCTION OF NEURONE
Neurones are specialized cells that transmit impulses (messages) around the body in form of electrical…
BONE
A bone is strong, hard and tough connective tissue mainly made of calcified material. …
THE HUMAN ASPECTS OF RIVERS
In many countries, rivers form the chief highways of commerce and transport. The Yangtze Kiang…
RIVER REJUVENATION
The earth’s crust is far from stable and it is not surprising that in the…
MUSCLES
Muscles can be referred to simply as the flesh mostly associated with bones to give…
TRANSPIRATION
Transpiration is the loss of water vapour from different parts of the plant shoot. These…
TYPES OF COASTS
Despite a great variety of coastal features, coastlines may be divided into two basic types….
COASTAL FEATURES OF DEPOSITION
1) Beaches: Sands and gravels loosened from the land are moved by waves to be…
COASTAL FEATURES OF EROSION
1) Capes and bays: On exposed coasts, the continual action of waves on rocks of…
