EXPERIMENTAL INVESTIGATION 9.4 How can we examine the interactions of organisms in a habitat?
Equipment Identification keys
Method Adaptation 1. Identify two plants and two animals from a local habitat, using an identification key.
2. For each named plant and animal, state three adaptations. Competition
1. Identify an example of competition between the following organisms: • two plants of the same species • two plants of different species • two animals of the same species • two animals of different species
Feeding relationships
1. Construct three separate food chains to represent this local habitat. There should be three to four links in each food chain.
2. Use the three food chains to construct a food web. Interdependence
1. Identify an example of interdependence between the following organisms: • two plants • two animals • a plant and an animal
Variation
1. Comment on the variation you observe between organisms for a named characteristic, for example, shape of leaves in plants or colour of fur in animals, in the following situations: • plants of the same species • plants of different species
• animals of the same species • animals of different species
) Fig. 9.16 Examining variation between organisms for a named characteristic
j Go to page 21 of your Experimental Investigations Log to write up this investigation.