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SS 2 Biology (1st, 2nd & 3rd Term)

The eyes

The Eyes | Anatomy, Functions, Problems, Solutions, Symptoms or Signs, Care For Eyes

The eyes are remarkable sensory organs that provide us with a sense of sight, allowing us to perceive the world around us in rich detail. Key Facts About The Eyes: 1. Complex Anatomy: The human eye is a complex structure made up of several components that work together to capture and process visual information. These […]

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Biology

OVERCROWDING AND FOOD SHORTAGE

OVERCROWDING This is a situation in which a population increases beyond a point called the carrying capacity where the resources (e.g., food and space) are not enough to support all the individuals in the population. Therefore, overcrowding reduces the food and space available for individual species in the population. FACTORS CAUSING OVERCROWDING Natality:  An increase

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Biology

ECOLOGICAL SUCCESSION

The orderly change in the inhabitants of an area over time is called succession. It can also be defined as the step by step orderly and gradual replacement of communities of organisms that leads to a climax community. An illustration of succession is that of a pond. Rain carries sediment from surrounding land into the

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Biology

POLLINATION

This is the transfer of mature pollen grains from the anther of one flower to the mature stigma of the same or another flower of the same plant or another plant of closely related species. Pollination usually precedes fertilization. There are two types of pollination namely, self-pollination and cross-pollination. SELF POLLINATION This is the transfer

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Biology

REPRODUCTIVE SYSTEM IN PLANTS

STRUCTURES AND FUNCTIONS OF THE REPRODUCTIVE ORGANS IN PLANTS The flower is the reproductive structure of a flowering plant. It has both male and female sex organs hence it can carry out sexual reproduction. After fertilization has taken place in flowers, seeds are produced. A flower has two major parts: The floral part (whorls) The

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Biology

EXCRETION AND EXCRETORY SYSTEM

Excretion is the process by which metabolic waste products are removed from the body of all living things. Excretion is different from egestion which is the removal of solid waste (undigested food substances i.e.faeces) through the anus. Excretion is necessary for the following reasons: To avoid or prevent any harm that would be caused by

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Biology

TRANSPORT SYSTEM IN HIGHER PLANTS

In simple unicellular plant materials are exchanged by simple diffusion process between the plants and its aquatic environment. Hence there is no need for elaborate transport system. However, in higher plant such as ferns and the flowering plants. There is a need for elaborate transport system for transporting water and mineral salts from the soil

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Biology

CIRCULATORY SYSTEM | CLOTTING, VESSELS, ARTERY, VEIN, HEART & ORGANS

PROTECTIVE FUNCTION OF BLOOD The blood performs two basic functions in mammals and these are: (1) Transportation of various substances and (2) Protection of the body against diseases The blood defends the body in major ways Antibody production (Clumping): The lymphocytes produce antibodies which are any of a large variety of proteins normally present in

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Biology

MAMMALIAN TEETH

TYPES OF TEETH Human beings have two sets of teeth in their lifetime. The first set is called the milk teeth that grow when the child is few months old. They are about twenty (20) in numbers. These include only three types of teeth i.e. Incisors, canine and premolars. They later fall off to be

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Agricultural Science

TISSUE AND SUPPORTING SYSTEM

To carry out life processes, all organisms (plants and animals) need tissues. Tissues are group of similar cells that carry out specific functions. Skeleton is the framework of the body which provides support, shape and protection to the soft tissues and organs in animals. It forms the central core of human body and it is

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Biology

ADAPTATION

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 behaviour. It is expected that every organism must adapt to its environment in order to survive. Plants and animals possess certain features which enable them to adapt to either aquatic

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Biology

ECOLOGICAL MANAGEMENT

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 are neutral while others are harmful.   Types of Associations Symbiosis Definition: This is a close association between two organisms in which one or both of them benefit from each

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Biology

CONSERVATION OF NATURAL RESOURCES

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 to preserve the quality or original nature of the environment. In other words, conservation is the preservation of natural resources from loss, waste or exploitation through rational use and to

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