The occurrence of photosynthesis in plants can be shown by experiments. The easiest proof that photosynthesis has...
BIOLOGY
Photosynthesisis the process by which carbohydrates or sugars are manufactured in the green parts of the plants...
This is a type of nutrition in which one organism obtains food from another organism and during...
Mouth The mouth has a horny covered tongue to facilitate swallowing of food substances to the oesophagus....
Mating and laying of eggs The adult male and female mate. The female lays fertilized eggs on...
Within the nucleus of non-dividing cells are strands or string-like structures known as chromosomes. As the cell...
Aim: To demonstrate the effects of mineral deficiency on plants. Material required: Nine wide-mouthed glass jars,...
Movement is the ability of living organisms to move from one place to another. Reasons for movement...
Dentition refers to the number, arrangement and conformation of teeth in an organism. Types of Dentition...
Unicellular Organisms There are no special respiratory organs in unicellular and aquatic organisms such as Amoeba and...
Organisms exhibit different feeding habits. These are: Filter Feeding Filter feeders which are also called microphagous feeders...
There are four types of excretory organs used by mammals. These are: lungs, skin, liver and kidneys....
Social animals are those in which individuals of the same species live together cooperatively in organized communities...
Behaviour is everything an organisms does in response to changes in its environment. It is basically adaptive,...
Adaptive colouration is the possession by an organisms, of a colour which enable it to catch its...
Structural adaptations are special modification of structures which help organisms to survive better in their various environment....
Adaptation is defined as the possession of special features or structure which improves the changes of an...
Structure of the blood The blood is a tissue in a fluid form. An adult man has...
The flower is the reproductive structure of flowering plants. It contains the male and female sex organs...
Adaptation is defined as the possession of the characteristics or traits or behaviour or structure or features...
Tolerance is the ability of living organisms to withstand or tolerate little unfavourable changes in the environment...
Decomposers Decomposers are fungi or bacteria which live saprophytically or feed on dead remains of plants, animals...
Pyramid of number refers to the number of individual organisms at each trophic level which decreases progressively...
Tadpole The young toad called tadpole uses gills for gaseous exchange. At the tadpole stage, the animal...
Metamophosis is defined as the series of gradual changes of form and shape of an insect from...
The cockroach exhibits incomplete metamorphosis. This starts from fertilised eggs to nymph and finally to adult or...
The vertebral column, also known as the backbone or spinal column, is the central supporting structure of...
Energy exists in various forms. These forms of energy are inter-convertible, i.e ., one form of energy...
In sexual reproduction, the male animal produces the sperm while the female produces the egg or ovum....
All living things are capable of responding to internal and external stimuli. The ability to do this...
It is sometimes very difficult to determine growth in organism. Growth varies from one organism to another....
The entire surface of the body is covered by skin. In man, the skin is about 1...
A cartilage is a tough elastic and semitransparent tissue devoid of blood vessels and nerves. Functions...
Carbohydrates are organic compounds containing carbon, hydrogen and oxygen atoms. The ratio of hydrogen to oxygen is...
Nastic/sleeping movements The pinnate and bipinnate leaves of many leguminous plants open and close as a result...
Enzymes are organic catalysts of protein origin produced by living cells which help to speed up or...
Food substances are chemical compounds and therefore can be tested chemically. Test for carbohydrates Test for...
1) Hibernation: Hibernation is a behavioural adaptation in which some small mammals such as shrews, monotremes and...
Stomata Stomata are openings in the epidermal layer of leaves of plants. Two guard cells surround each...
Auxins help primarily in influencing cell elongation and enlargement hence sometimes referred to as growth hormones. Actions...
Three pairs of salivary glands exist in man while in rabbit they are four pairs. In man,...
Skeleton is therefore, the hard framework on which the body is built. This hard framework may be...
Rhesus factor in some red blood cells in some human beings was named after the rhesus monkey...
Chitin is non living and non-cellular and is secreted by the underlying epidermis. It is a protein-carbohydrate...
Growth is defined as an irreversible or permanent increase in size, dry mass or weight due to...
There are five modifications and mechanisms of feeding associated with someorganisms. These feeding mechanisms include: 1) Absorbing...
Asexual is the type of reproduction in which new organisms are produced from a single parent without...
Reproduction is the ability of living organisms to give rise to new individuals of the same species....
The alimentary canal of man includes the mouth, oesophagus, stomach, duodenum, small intestine or ileum, caecum, appendix,...
FACTORS AFFECTING A POPULATION A number of factors referred to as environmental resistance control the population of...
