Biology Crossword

4. When a slight attraction develops between oppositely charged regions of nearby molecules
7. number of individuals in an area.
9. When an ecosystem only has 1 nutrient that is scarce or slow cycling
10. One or more electrons are transferred from one atom to another
11. or orientation releases waste materials
12. factors that shape an ecosystem, things that make the ecosystem a place where organisms are able to live
14. provides support for the body and connects its ports
15. organisms receping internal conditions despite changes in external environment
16. Feeds on plant and animal remains and other dead matter for energy
17. All organisms in an area plus the nonliving environment
19. mixtures of water and non dissolved material. ex. blood
20. Uneven disturbance of charge, water is negative on oxygen end and positive on the hydrogen end
23. transmits nerve impulses throughout the body
24. obtaining and using food

1. Forms when electrons are shared between atoms
2. Attraction between molecules of different substances causes capillary action
3. No two species can occupy the same niche in the same habitat at the same time
5. A disturbance in oxygen
6. Includes glands and tissues that cover interior and exterior surfaces.
8. along with bones, enables the body to move
13. biological influences, includes the organism itself and things it might interact with
18. Total living tissue with a trophic level
19. Any relationship in which two species live closely together
21. atoms of the same element, differ in the number of neutrons
22. An attraction between molecules of the same substance. Causes water molecules on a surface to form drops