Across
- 3. - the breaking down in living organisms of more complex substances into simpler ones, with the release of energy
- 7. reproduction - type of reproduction in which cells from two parents unite to form the first cell of a new organism
- 9. - relatively constant internal physical and chemical conditions that organisms maintain
- 12. - signal to which an organism responds
- 15. - group or level of organization into which organisms are classified
- 16. - hydrocarbons that contain only single bonds
- 17. - protein catalyst that speeds up the rate of specific biological reactions
- 19. - hydrocarbons that contain double or triple carbon-carbon bonds
- 22. - macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair
- 23. - groups of closely related species; the first part of the scientific name in binomial nomenclature
- 29. - the synthesis in living organisms of more complex substances from simpler ones
- 30. - compound made up of carbon, hydrogen, and oxygen atoms; type of nutrient that is the major source of energy for the body
- 32. - a carbohydrate whose molecules consist of a number of sugar molecules bonded together
- 34. - a compound that contains hydrocarbons, often associated with living things
- 35. - system of naming and classifying organisms based on shared characteristics and universal rules
- 37. - macromolecule made mostly from carbon and hydrogen atoms; includes fats, oils, and waxes
- 39. acid - macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
- 40. - in classification, a group of similar genera
- 41. - largest and most inclusive group in Linnaean classification
- 43. - scientific study of life
- 44. reaction - process that changes, or transforms, one set of chemicals into another set of chemicals
Down
- 1. - (deoxyribonucleic acid) genetic material that organisms inherit from their parents
- 2. - any substance that is composed of two molecules of simple sugars linked to each other
- 4. - in classification, a group of closely related families
- 5. - in classification, a group of closely related orders
- 6. - elements or compounds produced by a chemical reaction
- 8. - the combination of chemical reactions through which an organism builds up or breaks down materials
- 10. - reactant of an enzyme-catalyzed reaction
- 11. - change over time
- 13. - larger, more inclusive taxonomic category than a kingdom
- 14. bond - covalent bond formed between two amino acids
- 18. - subunit of which nucleic acids are composed; made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
- 20. reproduction - process of reproduction involving a single parent that results in offspring that are genetically identical to the parent
- 21. - molecules composed of many monomers; makes up macromolecules
- 24. - study of the diversity of life and the evolutionary relationships between organisms
- 25. - elements or compounds that enter into a chemical reaction
- 26. nomenclature - classification system in which each species is assigned a two-part scientific name
- 27. - the combination of many small molecules to form large molecules
- 28. - in classification, a group of closely related classes
- 31. acid - compound with an amino group on one end and a carboxyl group on the other end
- 33. - substance that speeds up the rate of a chemical reaction
- 36. -small chemical unit that makes up a polymer
- 38. energy - energy that is needed to get a reaction started
- 42. - simple sugar molecule