Question

practice problems: 1. what is the study of interactions between living things and other living things and between living things and their environment? 2. identify the following level of organization: all the salmon in a river all the fish in a river the river itself and all the life in it the tundra where all life on earth exists a frog on the riverbank a. biosphere b. community c. ecosystem d. biome e. organism f. population 3. put the following levels of organization in order from largest to smallest: biosphere, organism, biome, community, population 4. which level of organization is composed of a group of organisms of the same species? 5. which level of organization is composed of a group of organisms of different species? 6. which is the smallest level of organization that includes both living and nonliving factors? 7. in a pond ecosystem, list at least two biotic factors. 8. in a forest ecosystem, list at least two abiotic factors.

Explanation:

1. Ecology is the study of interactions between living - things and their environment.
2. All the salmon in a river is a population (same species in an area). All the fish in a river is a community (different species in an area). The river itself and all the life in it is an ecosystem (living and non - living components). The tundra is a biome (large area with distinct climate and life forms). Where all life on earth exists is the biosphere. A frog on the riverbank is an organism.
3. The order from largest to smallest is Biosphere, Biome, Community, Population, Organism.
4. A population is composed of a group of organisms of the same species.
5. A community is composed of a group of organisms of different species.
6. The smallest level of organization that includes both living and non - living factors is the ecosystem.
7. Biotic factors in a pond ecosystem could be fish and plants.
8. Abiotic factors in a forest ecosystem could be sunlight and soil.

Answer:

1. Ecology
2. all the salmon in a river - F. Population; all the fish in a river - B. Community; the river itself and all the life in it - C. Ecosystem; the tundra - D. Biome; where all life on earth exists - A. Biosphere; a frog on the riverbank - E. Organism
3. Biosphere, Biome, Community, Population, Organism
4. Population
5. Community
6. Ecosystem
7. Fish, plants
8. Sunlight, soil