Across
- 3. size refers to the number of individuals in a population.
- 6. rate the number of individual organisms born into a population in a given year
- 8. figures digits in the number that are reliable and necessary to indicate the quantity of something.
- 9. Mixture of gasses that surrounds a planet such as Earth
- 11. Variation The differences among alleles in a population's gene pool
- 12. the material structure of an individual life form.
Down
- 1. the process by which cells use carbon dioxide, water, and light energy to make oxygen and glucose.
- 2. notation A way of writing very large or small numbers that uses exponents.
- 4. The variety of life within a particular habitat, often measured by the number of different species.
- 5. the number of people, other living organisms, or crops that a region can support without environmental degradation.
- 7. Any substance in food that the body needs
- 10. all the organisms of the same species that live in the same area.