science

4. a graphic representation of the relation of two climatic elements plotted at monthly intervals throughout the year
7. a group of organisms living in the same place
8. (of a plant or animal) of indigenous origin or growth.
11. a tree that bears cones and needle-like or scale like leaves that are typically evergreen
12. an individual animal, plant, or single-celled life form.
15. a group of people living in the same place
16. a biological community of interacting organisms and their physical environment.
17. rain, snow, sleet, or hail that falls to the ground.
18. a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently froze

1. a change or the process of change by which an organism or species becomes better suited to its environment.
2. Reef a ridge of rock in the sea formed by the growth and deposit of coral.
3. a large open area of country covered with grass
5. the weather in an area
6. thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions.
9. forest found typically in tropical areas with consistently heavy rainfall.
10. a dry land full of sand
13. non living thing
14. denoting the milk teeth of a mammal, which are shed after a time.he sometimes swampy coniferous forest of high northern latitudes, especially that between the tundra and steppes of Siberia and North America.