Type the number

Exercise and reference answers

Questions

1. Answer

   3

   Question

   Broad categories of ecosystem by environment

2. Answer

   2

   Question

   Parameters used to measure ecosystem change

3. Answer

   3

   Question

   Kinds of ecological pyramid described

4. Answer

   2

   Question

   Trophic level number of a herbivore, counting producers as one

5. Answer

   1970

   Question

   Decade in the twentieth century when DDT was banned in the US

6. Answer

   20

   Question

   Kilocalories per square metre per year fixed at Silver Springs, thousands

Instructions

Type the number only.

Explanation