Ecosystem numbers

Exercise and reference answers

Questions

1. Answer

   1

   Question

   Trophic level of the producers

2. Answer

   3

   Question

   Types of ecological pyramid usually studied

3. Answer

   170

   Question

   Billion tons of yearly net primary productivity

4. Answer

   55

   Question

   Billion tons of it produced by the oceans

Instructions

Type the number only.

Explanation