Pre-AP Biology Fall Semester Crossword

1. An organelle that produces energy in the form of ATP for eukaryotic cells
7. Organelle that breaks down old cell parts and invading bacteria
9. An organism that must eat other organisms for energy
10. This type of transport requires an input of energy because movement is against the concentration gradient
12. An organism that has a nucleus and membrane bound organelles
15. Large geographic region with specific climate and organisms
18. A macromolecule made of amino acids
20. The process by which polymers are broken down into smaller monomers using water
22. An organelle that makes proteins through the process of translation
23. Organelle plants have that use sunlight and carbon dioxide to make glucose
25. Variable that the experimenter is testing the effect of

2. Type of macromolecule that is the body's main source of energy
3. This type of solution has a lower solute concentration than the cell and causes cells to swell
4. Community of organisms interacting with nonliving factors
5. Water is this because its atoms share electrons unequally, causing partial charges
6. A semi-permeable barrier that is present around all cells
8. Protein that speeds up chemical reactions
11. The type of bond that is between water molecules and gives water unique properties
13. Nonliving factor in an ecosystem
14. Stable internal conditions within an organism
16. The monomer of nucleic acids
17. This type of cell is small and simple with no nucleus or membrane bound organelles
19. The nutrient cycle characterized by bacteria converting the nutrient into useable forms
21. The property of water being attracted to other water molecules
24. The type of population growth where the population levels off at carrying capacity
26. This type of homeostatic feedback mechanism reduces the intensity of a response to restore stability