Animal Survival Responding to the Environment. G1: Give examples of environmental factors that affect behaviour –Moisture –pH –Light –Temperature.

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Presentation transcript:

Animal Survival Responding to the Environment

G1: Give examples of environmental factors that affect behaviour –Moisture –pH –Light –Temperature

C1: Explain the significance of responding to environmental stimuli

Woodlice Found in damp, dark conditions Why damp? Prevents body from drying out Why dark? Less likely to be seen by predators

Plant Shoots Will grow towards the light source Why? To improve the rate of photosynthesis

Frogs Found in damp conditions Why? Water is required for external fertilisation Frogs need moist skin for gas exchange

Choice Chamber Dark Light Dark Light G2: Describe the response of an animal to change in one environmental factor. 10 minutes eg, Woodlice  Light/Dark Conditions

Woodlice do not deliberately move to the dark side – when they are in bright light they move around more quickly and if they happen to move into the dark side they will slow down or stop.

Rhythmical Behaviour = behaviour that is repeated at definite intervals (daily, tidal or annually) External Trigger Stimulus = the environmental factor which causes the behaviour to start. G3: Describe examples of rhythmical behaviour and in each case, identify the external trigger stimulus. C2: Explain the significance of rhythmical behaviour in named animals.

Birds Migrate to warmer climates (annual rhythm) Trigger Stimulus = shorter day length Reason = escape cold temperature and shortage of food during the winter

Hedgehogs Hibernate through winter months (annual rhythm) Trigger Stimulus = shorter day length Reason = shortage of food during the winter

Cockroaches More active at night (daily rhythm - circadian rhythm) Trigger Stimulus = darkness Reason = avoid predators by feeding at night

Supported Study Programme DateBiology Topic/Type of Revision Tues 24 th Feb Problem Solving Wed 3 rd March The Body In Action (Movement, The Need for Energy) Wed 10 th March Animal Survival (Reproduction, Respond to Environment) Wed 17 th March Animal Survival (Water & Waste, The Need for Food) Wed 24 th March Inheritance Tues 30 th March Investigating Cells (Investigating Cells, Diffusion, Osmosis) Wed 21 st April Biotechnology