CONTROL OF HARMFUL MICRO-ORGANISMS The control of harmful microbes include removal, inhibition of growth or killing by physical agents/processes and chemical agents or antibiotics. Some common methods of controlling harmful… Read More »BETTER HEALTH: VECTORS, GOOD HEALTH & MICRO ORGANISMS
Sexually Transmitted Infections (STIs) (veneral diseases) are the diseases that are contacted through sexual intercourse. Examples include syphilis, gonorrhea, herpes, thrush, AIDSetc.The table below shows a list of STIs, their… Read More »SEXUALLY TRANSMITTED INFECTIONS (STI)
Bacteria reproduce by binary fission in which a single cell divides into two. This process is called asexual reproduction. The time interval required for the cell to divide into two… Read More »MICRO ORGANISMS: GROWTH, DISEASES, BENEFITS & HARMFUL EFFECTS
Micro-organisms otherwise called microbes or germs can be defined as living things which cannot be seen with unaided eye but by the use of microscopes. They exist almost everywhere,… Read More »MICRO-ORGANISMS
hen population-influenced factors (abiotic and biotic) are favourable, growth is promoted but when they are unfavourable growth is retarded.
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… Read More »ECOLOGICAL SUCCESSION
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… Read More »POLLINATION
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… Read More »REPRODUCTIVE SYSTEM IN PLANTS
REPRODUCTIVE SYSTEM Most multicellular animals and plants undergo a complex form of sexual reproduction in which especially differentiated male and female reproductive cells (gametes) unite to form a single cell,… Read More »MALE AND FEMALE REPRODUCTIVE STRUCTURES
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… Read More »EXCRETION AND EXCRETORY SYSTEM
TYPES OF ASSOCIATIONS AND THEIR FEATURES SYMBIOSIS OR MUTUALISM (+ +) Definition: When both population benefit and at least one of them is so dependent upon the other for some… Read More »ECOLOGICAL MANAGEMENT
FEEDING RELATIONSHIPS Since all living organisms must obtain energy and nutrients from the environment in order to remain alive, they are into feeding relationships. This makes an ecosystem a functional… Read More »FUNCTIONING ECOSYSTEM
POPULATION CHARACTERISTICS These include population size, density, frequency, percentage cover and distribution. Population size: – this is the number of organisms of the same species living together in a given… Read More »POPULATION
Biomes are large natural terrestrial ecosystems, identified by their dominant vegetation. They are terrestrial because plants form the bulk of the community in any ecosystem e.g. a forest biome has… Read More »BIOMES
DEFINITION OF ECOLOGY Ecology is the study of plant and animals (as well as microorganism) in relation to their environment. As a practical science, ecological studies involve:- Studying the distribution… Read More »BASIC ECOLOGICAL CONCEPTS
ANIMAL NUTRITION Animals generally cannot manufacture their food. Rather, they depend directly or indirectly on plants for their food. Hence they are called heterotrophs. Based on their food types, animals… Read More »NUTRITION IN ANIMALS
IRRITABILITY AND TYPES OF RESPONSES Irritability is the ability of organisms to respond to stimuli. A stimulus is any change in external or internal environmental condition which can bring about… Read More »IRRITABILITY/CELL REACTIONS TO ITS ENVIRONMENT
REPRODUCTION IN AMOEBA Amoeba reproduces asexually by binary fission and multiple fission (sporulation) during adverse condition. In binary fission when an amoeba reaches full size, it stops moving and divides… Read More »REPRODUCTION IN UNICELLULAR ORGANISMS AND INVERTEBRATES
There are two types of sexual reproduction, this includes conjugation and fusion of gametes. Conjugation: the simplest form of sexual reproduction, as contrasted with asexual reproduction. This is observed in… Read More »SEXUAL REPRODUCTION
MEANING AND TYPES OF REPRODUCTION Reproduction is the ability of an organism to give rise to new individuals of the same species in order to ensure continuity of life. There… Read More »REPRODUCTION