Page 61 - General and Inorganic Chemistry for Advanced Secondary Schools Students Book Form Five and Six

Biology for Secondary Schools

Task 4.2
Read from reliable online sources, library and other biology books the information
about artificial and natural classification systems.

Artificial system of classification
FOR ONLINE READING ONLY
Artificial classification system groups organisms according to a few observable
features, for example, the presence of legs or wings. Based on this, bees, birds, and
bats would be grouped together because they have wings. Snakes, earthworms,
and snails would also be grouped together because they do not have legs. Artificial
classification system also involves the use of some other characteristics, such as
size, how organisms move, where they live, or what they eat.

In the third century BC, Aristotle (a Greek philosopher) used artificial classification
system to classify plants. He grouped them according to their shape, size, and
their usefulness or unusefulness to humans.

Activity 4.2: Classifying living things using artificial system of classification

Materials: A variety of living things or charts that show pictures of a bird, bat,
bee, snake, snail, an earthworm, notebook and pen or a pencil
Procedure
1. Observe the organisms in Figure 4.2 and note as many observable features
as you can.

(b) (c)

(e) (f)

(d)
Figure 4.2: Variety of organisms (a) bird (b) bat (c) bee (d) snake (e) snail (f) earth-
worm

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