Across |
1. | found on leaves of plants in the desert to protect them from being eaten |
3. | 90% of the ocean is more than this deep |
7. | combination of interacting populations of different species |
10. | one of the types of trees found in the taiga |
11. | clams and crabs do this to protect agains waves |
13. | deserts usually get less than ____ cm of rain |
14. | the topsoil of the taiga develops as these decay |
16. | the top region of the rain forest |
18. | part of the desert plants that can do photosynthesis |
20. | large group of ecosystems that share the same type of climax community |
21. | mammals in the desert are of this type |
23. | the size of the intertidal zone depends on _____ of the land |
24. | climax communities are influenced by ______ |
25. | the size of the intertidal zone depends on the ____ of the tides |
27. | coastal body of water where freshwater and salt water mix |
29. | ability of an organism to withstand fluctuations in the environmental factors |
30. | these organisms secrete a strong glue to hold them into place and protect against waves |
31. | orderly, natural changes and species replacement |
36. | lichen and mosses are examples of these |
37. | nonliving factors |
39. | taiga stretches across this country |
41. | tides are caused by what force |
42. | permanently frozen ground |
44. | zone in the ocean that is deep and receives little sunlight |
47. | plant life in tundra is limited to ____________ grasses |
48. | tropical rain forests have so much diversity because they have always been near the equator and never covered with ___- |
49. | a grassland in Africa |
50. | Earth is 75% this |
51. | snails and slugs have these adaptations to help them hold onto rocks and protect them against wave action |
52. | the soil in a temperate forest is rich in humus and deeper layers of this |
53. | any factor that restricts the existence, number or reproduction of an organism |