1. Which of the following biomes is likely to have the longestfood chains?
| | Tundra |
| | Boreal forest/Taiga |
| | Temperate deciduous forest |
| | Open ocean |
| | Desert |
2. A key difference between the carbon, nitrogen, and phosphoruscycles is
| | carbon dioxide dissolves more readily in oceans thannitrogen |
| | phosphorus enters the biosphere primarily through soil ratherthan air and is less renewable than carbon dioxide or nitrogen |
| | most nitrogen in the atmosphere is in a readily usable formwhereas carbon in the air is hard to use |
| | carbon is more abundant in the air than nitrogen and phosphoruscombined |
| | the carbon cycle is strongly affected by human activity whilethe nitrogen and phosphorus cycles are unaltered |
3.
For which of the following organisms is the carrying capacity ofthe environment likely to be greatest
| | primary producer |
| | primary consumer |
| | secondary consumer |
| | tertiary consumer |
| | secondary detritivores |
4.
The biome contributing most to earth's total net primaryproductivity is
| | tropical rainforest |
| | boreal forest |
| | temperate deciduous forest |
| | algal bed and reef |
| | open ocean photic zone |
