Biology Vocab

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Across

2. reproduction reproduction where cells from different structures unit to form the first cell of a new organism.
3. Pure substance that consists entirely of one type of atom.
6. The basic unit of matter
7. acids macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus.
8. combination of chemical reactions through which an organism builds up or breaks down materials.
11. To change over time
16. Substance formed by the chemical combination of two or more elements.
17. atom that has a positive or negative charge.
19. small chemical unit that makes up a polymer.
20. Negatively charged particles, located in the space surrounding the nucleus.
21. Force of attraction between different kinds of molecules.
25. acid compound with an amino group on one end and a carboxyl group on the other end.
26. constant internal physical and chemical conditions that organisms maintain.
28. cell organelle that stores material such as water, salts, proteins and carbs.
32. when comparing two solutions, the solution with greater concentration of solutes.
37. A compound that forms hydrogen ions in solution, a solution with a pH of less than 7.
39. bond type of bonds between atoms in which the electrons are shared.
41. A compound that produces hydroxide ions in solution, a solution with a pH more than 7.
42. attraction between molecules of the same substance.
43. subunit that nucleic acids are composed; made of a 5-carbon sugar, a phosphate group, and a nitrogenous base.
44. material composed of two or more elements or compounds that are physically mixed together but not chemically combined.
46. cell organelle that breaks down lipids, carbs, and proteins into small molecules that can be used by the rest of the cell.
47. type of mixture in which all components are evenly distributed.
49. water channel protein in a cell.
50. process by which particles tend to move from an area where they are morew concentrated to an area where they are less concentrated.
51. bonds weak attraction between a hydrogen atom and another atom.

Down

1. basic unit of all forms of life
2. signal to which an organism responds.
4. in cells, structure that contains the shell's genetic material in the form of DNA.
5. molecules that are made of monomers, make up macromolecules.
9. when the concentration of two solutions are the same.
10. a unicellular organisms that lake a nucleus.
12. dissolving substance in a solution.
13. fluid portion of the cell outside the nucleus.
14. macromolecule made mostly of carbon and hydrogen atoms, includes facts, oils, and waxes.
15. genetic material that organisms inherit from their parents.
18. bond chemical bond formed when one or more electrons are transferred from one atom to another.
22. One of the several forms of a single element, contains the same number of protons but a different number of neutrons.
23. pressure pressure that must be applied to prevent osmotic movement across a selectively permeable membrane.
24. compound made out of carbon, hydrogen, and oxygen.
27. smallest unit of most compounds that displays all the properties of that compound.
29. relatively constant internal physical and chemical conditions that organisms maintain.
30. when comparing two solutions, the solution with the lesser concentration of solutes.
31. substance that is dissolved in a solution.
33. scale Scale with values from 0 to 14, used to measure the concentration of H+ ions.
34. macromolecule that contains carbon, hydrogen, oxygen, and nitrogen, is needed in the body for growth and repair.
35. mixture of water and no dissolved material.
36. group of similar cells that perform a particular function.
38. deer Waals forces Slight attraction that develops between oppositely charged regions of nearby molecules.
40. Preference or pov that is personal
41. scientific study of life
42. wall strong; supporting layer around the cell membrane in some cells.
45. organisms who's cells contain a nucleus.
48. A substance that prevents sharp, changes in ph.