biology

3. small, infectious agent that can replicate only inside the living cells of other organisms
5. the continuous movement of carbon atoms between the atmosphere
6. passing on their advantageous trait
7. relating to or resulting from living things
9. organisms whose cells lack a nucleus and other organelles
11. drift
14. an organism whose cells contain a nucleus
16. basic unit of a plant
17. the scientific study of how living organisms interact with each other and their physical environment
19. the process by which plants, algae, and some bacteria convert light energy into chemical energy
20. the biogeochemical process by which nitrogen is converted between different chemical forms.
21. a type of cell division where a single parent cell divides into two genetically identical daughter cells

1. the movement of water molecules across a selectively permeable membrane from a region
2. a natural process where individuals or groups best adapted to their environment survive and reproduce more successful
4. fluctuation of allele frequencies within a population
8. the body's ability to maintain a stable internal environment
10. study of the heredity info
12. in the heritable traits of a population of organisms over successive
13. a membrane-bound organelle within eukaryotic cells
15. physical rather than biological; not derived from living organisms.
18. the collection of all fossilized remains and traces of past life, ordered by their age and geological context