Biology

6. An evolutionary process by which species of different lineages independently develop similar characteristics
8. the natural science of the relationships among living organisms and their environment.
9. a tentative statement or explanation for a phenomenon that can be tested through observation and experimentation
10. the total amount of living matter in a given unit area.
12. relating to genes or heredity
14. not changing or varying, or continuing without pause
15. thread-like structures located in the nucleus of a cell, composed of DNA tightly coiled around proteins called histones

1. the variety of plant and animal life in a habitat.
2. variable a variable (often denoted by x ) whose variation does not depend on that of another.
3. the basic structural and functional unit of all organisms.
4. not changing or varying, or continuing without pause
5. he process by which one prokaryotic cell divides into two identical daughter cells
7. a variable (often denoted by y ) whose value depends on that of another.
11. a thin, flexible layer of material that separates two compartments or environments
13. The process of producing individual organisms or molecules with identical or virtually identical DNA, either naturally or artificially.