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

(1) Role of government in agricultural production
Environmental factors required for food production
3Ways of improving crop production

A pest is an organism which harbors disease organism(s) or causes damage to other organism(s). There are crop and livestock (animals) pests.

CLASSIFICATION OF PLANTS Plants exists in various forms and types hence, the need for classification.  Plants can be classified on the following bases Botanical classification Agricultural classification Classification based on… Read More »IMPORTANCE OF BIOLOGY TO AGRICULTURE

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

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 ecosystem, 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

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 include 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