Hierarchical classification of living things
5$:'
Studying living things in their
natural habitat can be difficult.
Fish
A group of students suggests
reproducing a habitat in class
using a small aquarium. This
picture includes an aquarium
and its main components.
Arr pump
Aquatic plants
Gravel
1"
In order for flsh to survive, the aquarium must prov de
everything they need. Name the aquarium component
that provides them with each factor
S, What wouLd be the naturaI habitat for the oTgan]sms
thrs aquarium? WhY?
4,
Four species of flsh are incLuded in the aquar um
Lig ht
0xyg
en
Adequate temperature
MineraL saLts
There are liv ng and non-liv ng things in the aquarum.
al Lrst the lrvrng thLngs in the aquarium.
bl Use the fol.l.owrng table to c[assrfy the
Living
th ngs tnto
Use the foLlow ng dlchotomous key to identify each
species [A B, C and D]
two groups according to the r type of nutritron.
Water and
substances from
other Living things.
Water and other
inorganic substances,
Iike carbon dioxide,
2
With barbeLs.
Catf ish
Without barbeLs.
Goto2
With a long pointed taiL f in.
SwordtaiL
Without a Long pointed
tail. fin.
Goto3
mineraL saLts, etc.
c) Name four characteristics that a[low us to d stinguish
living from non living things.
With a coLoured taiL f in.
Guppy
Without a coLoured taii fin.
Bl.ack moLLy
3
In