Independence and adaptation
- Created by: JessicaGrey
- Created on: 09-04-16 11:11
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- Independence and Adaptation
- Competition. Microorgamisms compete to survive and reproduce
- Animals compete for food, territory and mates
- Plants compete for light, space, water and nutrients
- Extremophiles (low competition)
- Salt (sea/lakes)- Mangroves have special roots that only absorb water not salt.
- Heat- Camals and Bacteria- must have special enzymes that are tolerant to high temperature( do not denature)
- Pressure (deep sea)- bacteria, specific fish and sea mammals
- Cold Environments
- Thick fur, thick layer of fat (reduce heat loss/ good insulators), camouflage, small surface area
- Dry Environments (plants)
- Thick stem to store water,
- Spikes/leaves have small surface area to reduce water loss
- Large, extensive roots near surface to absorb max water before evapouration
- Surface area
- Cold environment= small surface area eg polar bears have very small ears to reduce heat loss.
- Hot environments= large surface area eg elephants have very large ears for max heat loss.
- Dry environments= small surface area to reduce water loss eg cactus have spikes/leaves
- Changes in the environment affect the distribution
of living organisms.
- Population size and distribution influenced by ...
- Living: competition, predators and disease.
- Non-living:: temperature, nutrients, rainfall and pollution.
- Population size and distribution influenced by ...
- Pollution indicators
- Lichens (air pollution)
- Sensitive to sulfur dioxide.
- No lichen= heavy levels of pollution
- Invertebrates (water pollution)
- Indicate concentration of dissolved oxygen in water
- Lichens (air pollution)
- Measuring environmental change
- Rainfall measured by a rain gauge
- Oxygen levels in water can be measured using oxygen probes
- To measure temp you can use a thermometer or a digital thermometer as it is continuous and doesn't need a person to read it.
- Competition. Microorgamisms compete to survive and reproduce
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