Regents Review Packet 3: Similarities and Differences Among Living Organisms
1. They both maintain homeostasis and have metabolism. (All the living-things characteristics work for this answer)
2. 3 à homeostasis is internal balance
3. 2
4. a microscope could allow you to see if the organism has cells or not. Living things have cells, non-living things do not
5. 4à metabolism is all of the organisms life activities.
6. 1
7. 2
8. there are a bunch of answers. For one, living things excrete things, non-living things don’t. Living things grow, non-living things don’t. Living things have nutrition, non-living things don’t.
9. 4
10. 3 à HONC with a C, not with a K
11. 1
12. 1
13. 3
14. 1
15. 3 à Vacuoles are storage sacs. They transport things into and out of the cell
16. 3
17. 3
18. 2 à Mitochondria for cellular respiration, chloroplasts for photosynthesis (making glucose and all that good stuff)
19. 2 à Proteins are MADE at the ribosomes in ALL living cells.
20. 4 à diffusion is a passive process
21. The receptor molecules on the dentrites on cell B receive nerve impulses from the axon on cell A
22. 2
23. 4
24. 4
25. 2
26. 3 (Note: Cell wall does not shrink!)
27. 4
28. 1
29. 2
30. 1 (hypertonic)
31. 2 (4 inside, 1 outside, so CO2 will go out of the cell)
32. 3 (100%-98% = 2% salt. The solution and cell are in equilibrium)
33. 2 (hypertonic)
34. 3
35. 1
36. 1
37. 3
38. 2 (That’s an alveoli!)
39. 1 (To do those things, the organisms have to MOVE!)
40. 3 (the ribosome)
41. 3 (The brain is part of the nervous system)
42. 1 (Very poorly worded question… don’t fret if you got it wrong)
43. digestion breaks down the food so it can be absorbed into the circulatory system and transported throughout the body
44. Nervous system to get the message from your finger to the brain and then from your brain to your muscular system to move your hand.
45. We use the same types of chemical composition (HONC.) and genetic information (DNA) as other organisms. The only thing that is different is the percentages in each.
Part A
1. 2
2. 4 (Cellular respiration)
3. 1
4. 4
5. 3
6. 2
7. 1
8. 4
9. 1 (Remember, it’s always the water that moves, not the salt)
10. 4
11. 3
12. 4
13. 4
14. 3
15. 2
16. 4
17. 1
18. 1
19. 2
20. 2
21. 3
Part B
22. The algae cells couldn’t survive without mitochondria because they would be unable to carry out cellular respiration. Respiration releases energy (ATP) from nutrients for the cells to use.
23. Cells have to communicate so that their activities can be coordinated. (They have to work together) By doing this, the organisms can maintain homeostasis.
24. 3
25. 3
26. 2
Part C
27. A dead cell can still carry out diffusion, because it is a passive process. It involves no energy. A dead cell cannot carry out active transport though because it does require energy. A dead cell can’t make energy so it can’t use energy.
28. The cells in the pond water had more salt and less water than the salt water, so the water moved into the cell (HYPOTONIC= HYPO/HIPPO) causing it to burst. The land cells had a higher concentration of water and a lower concentration of salt, so the water went out of the cell, causing it to shrink (HYPERTONIC)
29. Salt kills bacteria by dehydrating it. The water in the bacteria is drawn out by the salt and so the bacteria dies of dehydration.
30. Adrenaline attaches to receptors on the heart muscle cells and stimulated the heart to beat faster.
31. beta blockers are the handle looking things, adrenaline molecules are the balls and the heart receptors are the Ys.
32. The balls are adrenaline because they fit into the receptors on the cell’s membrane. The handles are the beta blockers because they can cover the receptors and keep the adrenaline away. And Y’s are the receptors because they are on the cell membrane’s surface.
33. A normal person taking the beta blockers would make their heart work too slowly. This is dangerous.