biology

2. a mixture of fresh water draining from the land and salty seawater
6. the study of how weather affects organisms and how organisms adapt to weather
7. the range of environmental conditions that an organism can withstand or survive within
8. a diverse group of organisms that drift in water or air and are unable to swim against currents or wind
9. the natural environment where an organism lives
13. a large area of land or water with a specific climate, landscape, and plant and animal life
14. an association between two organisms in which one benefits and the other derives neither benefit nor harm.
15. the doctrine that mutual dependence is necessary to social well-being

1. when animals eat plants, including their leaves, stems, flowers, fruits, roots, and tubers
3. a stock or supply of money, materials, staff, and other assets that can be drawn on by a person or organization in order to function effectively
4. the preying of one animal on others
5. a relationship between two organisms where one organism, the parasite, benefits at the expense of the other, the host
10. a low-lying area of land that's saturated with water, either permanently or seasonally
11. the role of a species in an ecosystem
12. a close relationship between two or more organisms that live together