1. Characteristics and Classification of Living Organisms

1.4) Dichotomous keys Used to identify unfamiliar organisms. They simplify the process of identification. Each key is made up of pairs of contrasting features. (dichotomous means two branches)

1.3) Features of organisms   All living organisms have certain features in common, including the presence of cytoplasm, cell membranes, DNA as genetic material. Also contain ribosomes (in the cytoplasm), floating freely or attached to membranes called rough...

1.2) Concept and use of classification system   Species: is a group of organisms that can reproduce to produce fertile offspring. Binomial system: is an internationally agreed system in which the scientific name of an organism is made up of two parts showing the...

1.1) Characteristics of living organisms   Movement: is an action by an organism or part of an organism causing a change of position or place. Respiration: describes the chemical reactions in cells that break down nutrient molecules and release energy for...