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🙏 Free review 2020
Major Environmental Disasters
- Why Do I Need to Know These?
- What Are These Major Environmental Disasters?
- Unit 6 - Energy Resources - Disasters
- Chernobyl, Ukraine
- Three Mile Island, Pennsylvania
- Fukushima Daiichi Reactor, Japan
- Exxon Valdez, Alaska
- Unit 7 - Air Pollution - Disasters
- Great Smog, London
- Unit 8 - Aquatic/Terrestrial Pollution, Waste, and Toxicity - Disasters
- Bhopal, India
- Love Canal, New York
- Minamata Bay, Japan
- Unit 9 - Global Change - Disasters
- Great Barrier Coral Reef Bleaching, Australia, Pacific Ocean
Required Environmental Legislation
- Why Do I Need to Know These?
- What Are The Required Pieces of Legislation?
- Laws Involving the Disposal of Hazardous Wastes
- RCRA: Resource Conservation and Recovery Act
- CERCLA: Comprehensive Environmental Response, Compensation, and Liability Act
- Air & Water Protection
- Clean Air Act
- Clean Water Act
- Safe Drinking Water Act (SDWA)
- Biodiversity Protection
- CITES: Convention on Int’l Trade in Endangered Species of Wild Fauna & Flora
- Endangered Species Act
- Commonly Confused International Protocols
- Montreal Protocol
- Kyoto Protocol
- Carcinogens
- Delaney Clause Of Food, Drug, and Cosmetic Act
✍️ Free Response Questions (FRQs)
🏜 Unit 1: The Living World: Ecosystems
🐠 Unit 2: The Living World: Biodiversity
👪 Unit 3: Populations
3.0Unit 3 Overview: Populations
- ⚡ Key Terms
- 3.1 Generalist and Specialist Species
- 3.2 K Selected and r selected species
- 3.3 Survivorship curves
- 3.4 Carrying Capacity
- 3.5 Population Growth and Resource Availability
- 3.6 Age Structure Diagrams
- 3.7 Total fertility rate
- 3.8 Human Population Dynamics
- 3.9 Demographic Transition
- ⚡ Quick Study - Key Terms
🌏 Unit 4: Earth Systems and Resources
🏖 Unit 5: Land and Water Use
⚡️ Unit 6: Energy Resources and Consumption
💨 Unit 7: Atmospheric Pollution
♻️ Unit 8: Aquatic and Terrestrial Pollution
🔥 Unit 9: Global Change
🧐 Multiple Choice Questions (MCQs)
2.6 Adaptations
#survivalofthefittest
#reproductiveisolation
#sympatricspeciation
#allopatricspeciation
⏱️ 1 min read
written by
joshua nielsen
April 29, 2020
Vocabulary
Adaptations
Traits
Evolution
Survival of the Fittest
Allopatric Speciation
Sympatric Speciation
Reproductive Isolation
Adapt to the Surroundings
In order for a population to live in an ecosystem, they must have the traits (genes). Its a case of Survival of the Fittest: those that have the right genes for the ecosystem, tend to live longer.
Image courtesy of Pixabay
As the ecosystems change, so too must the populations that live in them, or perish. Evolution is inevitable. Populations with a diverse gene pool, have a better chance of survival when ecosystem changes occur. Not all members of the population may have the genes necessary to adapt to the change, but if enough do then they may pass this on to the offspring. Those that don’t, won’t and those genes die out.
Reproductive Isolation
Populations may diverge from the original due to changes in the environment. Reproductive isolation is when two populations are no longer able to reproduce with each other. If there is a physical barrier between them (a road cutting through a forest), this is allopatric speciation.
Image courtesy of Pixabay
However, if the populations are in the same area but do not reproduce, this is sympatric speciation. The latter may be because reproduction times are different (early bird vs night owl) or seasons are different for the two populations.
🎥 Watch: AP Environmental Science Streams
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