1. connects bone to bone

2. A collection of all of the different populations that live in one area, interacting with each other.

3. The wide, partially enclosed part of a river where it flows into the ocean; a nutrient-rich area where fresh and salt water mix.

4. An organism that can make its own food.

5. Anaerobic process by which 2 molecules of ATP are produced per molecule of glucose; identified by its products. (Examples: lactic acid fermentation and alcoholic fermentation.)

6. Food shortages and living space

7. A cell that contains a nucleus and membrane bound organelles

8. A substance that lowers the energy needed to start a chemical reaction (activation energy) without itself being affected or used up.

9. Small, short, and abundant hairlike structures on cells; often form part of a fringe; found on cells that are capable of lashing movement. Especially useful for free unicellular organisms to produce movement or in more advanced organisms, a current of fluid. (Example: cilia move the egg down the oviduct toward the uterus.)

10. The process whereby genetic information coded in messenger RNA (mRNA) is used by a ribosome in the cytoplasm to direct the formation of a specific protein.

11. Nonpolar organic compound, insoluble in water but soluble in organic solvents; essential structural component of living cells; also used for energy storage.

12. The final stage in speciation; populations of organisms become separated and can no longer interbreed; they are either unable to mate or unable to produce viable offspring.

13. Division of the cytoplasm and organelles of a cell following mitosis or meiosis, bringing about the separation into two daughter cells. Involves formation of a cleavage furrow in animals or construction of a wall in plants.

14. the layer of skin below the epidermis

15. The preservation and careful management of the environment and of existing natural resources.

16. The period of the cell cycle during which the nucleus is not undergoing division; the cell is performing its job during this time; divided into three phases of its own: G1 (growth), S (synthesis [copying] of DNA), and G2 (preparation for mitosis or meiosis).

17. An organism or cell having two complete sets of chromosomes, one set provided by each parent; symbolized 2n; found in all cells except sex cells.

18. Taxonomic group containing one or more species; the first name in the 'specific epithet.'

19. A test that determines if an organism is homozygous dominant or heterozygous; an organism of unknown genotype but dominant phenotype is crossed with a homozygous recessive organism. If any of the offspring show the recessive phenotype, then the genotype of the parent being tested is heterozygous for that trait. (Examples of expected outcomes: TT X tt = Tt; Tt X tt = 1/2 Tt and 1/2 tt.)

20. The pattern, or structure, of the cell membrane; a flexible--or fluid--bilayer of phospholipid molecules interspersed with proteins. The 'mosaic' part refers to the proteins embedded in the phospholipid bilayer, which act as transport channels, receptors, or antigens.

21. An adaptation which allows an organism to blend in with the environment.

22. A homogeneous mixture of two or more substances; a liquid solution.

23. Something that is harmful or poisonous.

24. The process by which plants turn carbon dioxide gas into organic compounds such as carbohydrates through photosynthesis.

25. The basic structural unit of nucleic acids (DNA or RNA); made up of a phosphate group, a 5-C sugar, and a nitrogen base.