Test Review answers for Populations and Communities Chapter 11

11:1 Living things and the Environment Study of how living & non-living things interact with each other Sunlight, soil, oxygen, temperature, & water Snake, prairie dog, & owl (other answers acceptable) Habitat Ecosystem Biotic factors community

11:1 Living things and the Environment A – grass True C – bacteria D – Ecosystem, community, population, organism False; sunlight False; species B – habitat False; abiotic

168/(12 x 7)= 2 mice per square meter 1992-1994 & 1997-1999 11:2 Populations 168/(12 x 7)= 2 mice per square meter 1992-1994 & 1997-1999 Immigration & births INCREASE 1994 ; 225 Immigration Emigration & death INCREASE Emigration Population Food, space, weather (reasonable explanations) Death rate 1994-1997

False; greater than Limiting factors False; into Carrying capacity 11:2 Populations False; greater than Limiting factors False; into Carrying capacity True Emigration False; death rate Space Weather

11:3 Living things and the Environment The fittest survive, reproduce, and pass on their DNA to their offspring. An organism’s niche is its role in its habitat. Adaptations help an organism specialize so they are not require to be in direct competition with others.

11:3 Living things and the Environment When the hare population increases, so does the lynx population because there is more food. When the lynx population increases, the hare population will decrease because there are more lynx that need food to eat. Lack of food, shelter, water, and disease, etc.

11:3 Living things and the Environment Predator- the organism that does the killing in order to get energy Competition- the struggle between organisms to survive as they attempt to use the same limited resources. Symbiosis- any relationship in which two species live closely together and at lease one organism benefits.