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Biology
| Question | Answer |
|---|---|
| what are the 3 major threats of biodiversity? | (blank) |
| Why do we need all those species? | biologically diverse ecosystems are usually more stable than simple ones |
| keystone specie | is the specie that holds the whole ecosystem together. If you remove it, then the whole ecosystem system can collapse. |
| Example of a keystone specie | flying fox bat in South Pacific Islands. This bat was the only pollinator and seed disperser. Then the fruits stopped growing. |
| Carrying capacity | the # of individuals in a pop. that tne environ, can maintain. |
| limiting factors that slow pop. growth | food supply, toxic waste buildup, increase disease, predation aggression (crime and war), conscientious choice |
| Green House gases (from most to least) | water vapor, carbon dioxide, ozone |
| Since the start of the Industrial Revolution, human activities have released about how much CO2? | 290 billion metric tons |
| How much CO2 has increased in the atmospheric level? | 36% in the last 150 years |
| Why do we care if artic ice melts? | polar bear drowns, effect world economy, flooding, weather changing, |
| what is albedo | reflecting back (like snow reflecting back sunlight) |
| homeostasis | similar standing, maintence of stable condition, our body condition flutation within a narrow range |
| negative feedback | "I have enough, I don't need anymore, so I stop that production" |
| positive feedback | product simulate that reaction. |
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