Across
- 3. a sequence of DNA that codes for a protein and determines a trait
- 6. a process not requiring oxygen
- 9. the anaerobic stage of cellular respiration
- 11. protein that controls the timing of the cell cycle
- 14. relatively constant internal physical and chemical conditions that organisms maintain
- 16. an element or compound that enters a chemical reaction
- 17. the period of the cell cycle between cell divisions
- 21. the macromolecule that provides energy for the body as sugar
- 22. one of the different forms of a gene
- 23. the combination of chemical reactions through which an organism builds up or breaks down materials
- 24. unicellular organism that lacks a nucleus
- 25. one stack of thylakoid membranes
- 27. cell that is capable of developing into all cell types
- 29. the specific membrane in the chloroplast where photosynthesis occurs
- 30. the type of bond formed between atoms that share electrons
Down
- 1. a process requiring oxygen
- 2. process of sexual reproduction in which male and female reproductive cells unite to form one cell
- 4. the food-making process of plants
- 5. the scientific study of heredity
- 7. stage of early development in mammals that consists of a hollow ball of cells
- 8. any light-absorbing, color compound
- 10. the network of protein filaments in a eukaryotic cell that give the cell its shape and internal organization and is involved in movement
- 12. a form of an element with a different number of neutrons
- 13. signal to which an organism responds
- 15. a logical interpretation based on prior knowledge and experience
- 18. change over time
- 19. offspring of crosses between parents with different traits
- 20. specific characteristic of an individual
- 21. cell organelle found in plants that converts light energy into chemical energy
- 26. division of the cytoplasm to form 2 separate daughter cells
- 28. a protein catalyst that speeds up chemical reactions