B3 - Life on Earth
- Created by: eloisa_braith
- Created on: 23-03-15 16:55
View mindmap
- B3 - Life on Earth
- Adaptation & Variation
- Adaptation
- Something is changed/developed o help in a living environment
- Species
- Group of organisms that breed to produce fertile offspring
- Come from 5 kingdoms of organisms
- Bacteria
- Fungi
- Algea
- Plants
- Animals
- Adaptation
- Natural Selection "Survival of the Fittest"
- Selective Breeding
- Humans choose features for next generation
- Only for animals & plants
- May not help survival
- Humans choose features for next generation
- Individuals compete for resources to survive
- Survivers breed with survivers
- Pass on characteristics that helped survive
- New generation are better survivers
- Pass on characteristics that helped survive
- Survivers breed with survivers
- Selective Breeding
- Evolution & Extinction
- Biodiversity
- Increasing
- Human activity
- Direct
- Hunting
- Indirect
- Destroying habitats
- Introducing new species to compete with
- Direct
- Human activity
- Increasing
- Biodiversity
- Survival
- Oxygen
- For animals and plants
- Water
- Needed by living organisms
- Food
- For animals
- Minerals
- For plants
- Carbon dioxide
- Plants
- Other organisms
- Food web
- Primary -> Secondary -> Tertiary
- Food web
- Oxygen
- Ecosystem
- Sun
- Source of energy for nearly all life on Earth
- Energy transferred through animals eating plants & other animals
- Also transferred when decomposers feed on dead organisms & waste materials
- Energy lost as:
- Respiration (to stay alive)
- Heat (to surroundings)
- Waste products (faeces & urine & uneaten organisms)
- Energy lost as:
- Also transferred when decomposers feed on dead organisms & waste materials
- Energy transferred through animals eating plants & other animals
- Light energy is converted to chemicals which make up plants' cells
- Source of energy for nearly all life on Earth
- Sun
- Sustainability
- Living well today & ensuring those in the future can too
- Environment
- Not enough resources for population growth
- Economy
- Not enough room to farm valuable plants/crops
- Social
- Farmers get low yield when nutrients are lost so move to new areas
- Farmers grown 'Legume plants' which add nutrients to soil so have higher yield
- Farmers get low yield when nutrients are lost so move to new areas
- Adaptation & Variation
- Something is changed/developed o help in a living environment
- Biodiversity
- Increasing
- Human activity
- Direct
- Hunting
- Indirect
- Destroying habitats
- Introducing new species to compete with
- Direct
- Human activity
- Increasing
Comments
No comments have yet been made