1. Test Review answers for Populations and Communities
Chapter 11

2. 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

3. 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

4. 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
&
Immigration & births INCREASE
1994 ; 225
Immigration
Emigration & death INCREASE
Emigration
Population
Food, space, weather (reasonable explanations)
Death rate

5. 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

6. 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.

7. 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.

8. 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.