biomes

4. / small, aquatic microorganisms in the water column phytoplankton / microscopic marine algae
8. / the capacity of a crop to successfully produce a satisfactory yield in water shortage conditions
11. zone / The shallow down-sloping of a lake or pond
12. grasslands / composed of a rich mix of grasses and forbs and underlain by some of the world's most fertile
13. / of, found in, or produced by the sea.
15. / the sometimes swampy coniferous forest of high northern latitudes, especially that between the tundra and steppes of Siberia and North America.
17. / areas where water covers the soil, or is present either at or near the top of the soil all year or for periods of time during the year.
18. / bodies of water usually found where rivers meet the sea

1. / a variety of temperate forest 'dominated' by deciduous trees that lose their leaves each winter.
2. / an area classified according to the species that live in that location
3. /an underwater ecosystem with reef-building corals
5. / naturally occurring water that is not salty, and is suitable for consumption if clean or processed.
6. / the lowest ecological zone in a body of water
7. / the aboveground portion of a plant cropping or crop
9. / a thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions.
10. / spend a hot or dry period in a state of torpor or dormancy.
14. / vegetation consisting chiefly of tangled shrubs and thorny bushes.
16. / a dry, barren area of land, especially one covered with sand, that is characteristically desolate, waterless, and without vegetation.