Science

4. Organelles responsible for energy production (cellular respiration).
8. A group of organisms that can interbreed and produce fertile offspring.
10. Specialized structures within a cell that have specific functions.
14. An individual living thing.
15. A community of living organisms interacting with their environment.
17. The natural environment where an organism lives.
18. A structure made up of different tissues working together to carry out a specific function.
19. A group of similar cells working together to perform a specific function.
20. The process of adjusting to the environment or a specific condition.

1. The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.
2. The central control center of a cell that contains genetic material (DNA).
3. The study of relationships between living organisms and their environment.
5. The biological process by which new individual organisms are produced.
6. The study of genes, heredity, and variation in living organisms.
7. System The system responsible for the circulation of blood and transport of nutrients and oxygen throughout the body.
9. The basic unit of life, the smallest structure capable of performing all the processes necessary for life.
11. (Deoxyribonucleic Acid)The genetic material that carries the instructions for the development, functioning, growth, and reproduction of all known living organisms.
12. The process by which cells break down glucose to release energy.
13. Chain A sequence of organisms, each of which uses the next lower member of the sequence as a food source.
16. The gradual change in a species over time.