Heard animals are usually concentrated in the _____ biome.

2. Heard animals are usually concentrated in the _____ biome. Grassland

3. Microscopic organisms that float in the sunlit regions of the ocean are ________ plankton

4. The great northern coniferous forest are part of the ___ biome taiga

5. _____ is a layer of soil that remains frozen throughout the year permafrost

6. ____ is a major limiting factor of the tundra biome. temperature

7. A body of water near the coast that is partly surrounded by land and contains both fresh and salt water is known as the ________ estuary

8. Phytoplankton, which obtain energy by photosynthesis, are usually found concentrated in the ____ zone of the ocean. photic

9. Succession ______ is the replacement of one community by another as environmental conditions change

10. A _____ community is usually the stable result of succession. Climax

11. The region of the ocean shallow enough for sunlight to penetrate is the ________ Photic zone

12. _____ factors restrict the numbers of organism that can exist. Limiting

13. The portion of the shoreline that is affected by high and low tides is the ______ zone. intertidal

14. Age, physical condition, and stage in its life cycle may all influence an organism’s limits of ______ tolerance

15. Conditions that restrict the existence, population size, reproductive success, or distribution of organism are called ___________. Limiting factors

16. The range of factors under which an organism functions and survives is known as ________ Tolerance

17. The _______ community is a stable, mature community that undergoes little or no succession. climax

18. The _____ is a region dominated by deciduous trees. Temperate or Deciduous forest

19. The colonization of new sites by communities of organism is _______ succession. primary

20. A large group of ecosystems characterized by the same type of climax community is called a _________ biome

21. The ____ is an arid region characterized by little or no plant life. desert

22. An uncut lawn becomes a meadow and eventually a forest. This process is an example of _____ succession. secondary

23. In oceans _____ produces food by photosynthesis. _____ eats phytoplankton, which is eaten by _____ Phytoplankton, Zooplankton, fish

24. If fish in a tank of slightly alkaline water, the fish stop reproducing if the water becomes too alkaline. This is an example of _____ Tolerance and intolerance

25. The factor that differentiates the photic and aphotic zones in oceans is _______. light

26. The stable ecosystem that develops due to succession is called a ______ ______ Climax community

27. _______ is the ability of an organism to withstand changes in abiotic and biotic factors in an ecosystem Tolerance

28. What is a succulent plants with thorns that are common in desert biomes? Cacti

29. The first organisms to appear in an area undergoing succession are known as _______ Pioneer species

30. The absence of permafrost and presence of coniferous trees as the dominant climax plants characterize the ____ biome. taiga

31. Salt marsh ecosystems are usually associated with _______. estuaries

32. The concentration of dissolved salt in estuary water would be between the concentration of salt in river water and _____ water. Ocean

33. In a _________ biome, decomposition occurs too quickly for humus to form. Tropical rain forest

34. Water temperature and light are two ____ (abiotic or biotic) factors that affect the tolerance range of organisms in a lake. abiotic

35. Fires, natural disasters, and human intervention are possible causes of _______ succession. secondary

36. ______ communities are characterized by complex food webs, many different species of organisms, and little or no succession. Climax

37. Intertidal zone produces (few or many) produce few Why? Crashing waves allows For little floating Or take hold on bottom

38. In which biome would you find only shallow-rooted grasses and small plants like lichens and moss. tundra

39. In which biome would you expect to find the greatest biomass? Tropical rain forest

40. Another name for grasslands is ____ Savannas

41. The floating protists, animal eggs and larvae in photic zones are known as ________ plankton

42. The top layer of the rain forest is called? Canopy

43. The lowest layer of the tropical rain forest is the ______. ground

44. The middle sections of the tropical rain forest is the ___________ understory

45. Another name for the Taiga is _______ Boreal or northern Coniferous forest

46. The causes of ocean tides rising and falling is ___________ Gravitational pull Of sun and moon

47. The thick matt of grass that traps organic material in the aquatic biomes. Salt Marsh

48. Two examples of pioneer species are ________. Moss and Lichen