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Environmental science

Darren Malthouse

Revision Exercise

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      7 8            
14                                               15
          18               19

3.Caused by living organisms
8.Doesn't live long but reproduces a lot
12.An ecosystem covering a broad area which has distinctive climatic and soil conditions
14.The connection between predator and prey populations
17.Something that live in or on something else and causes harm
18.Movement of a specieas from one ecosystem to another
20.Non living components of the environment
1.A factor whose effect on a population is the same whatever the population (usually Abiotic)
2.Factors that slow down the growth rate of species
4.Competition between different species
5.Competition between members of the same species
6.Factors whose effects on a population are relatively greater at higher population densities than at lowere population densities
7.The part of the earth where life can exist
9.All of the different populations of organisms that live together
10.All the members of a single species living in a particular area at the same time
11.The maximum number of organisms an area can support sustainably
13.A particular type of organism, where two individuals interbreed to produce offspring
15.Lives long and isn't predated
16.The particular place where a community of organisms is found
19.A description of the precise way in which an organism fits into its environment.

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