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Biology
Week 10/19 Review 4
| Question | Answer |
|---|---|
| why cells are small | to maintain a high surface area-to-volume ratio, which allows nutrients, oxygen, and waste to move in and out of the cell quickly |
| two types of cells | prokaryotic and eukaryotic |
| levels of organization from smallest structure to largest | Molecule → Organelle → Cell → Tissue → Organ → Organ System → Organism → Population → Community → Ecosystem → Biosphere |
| Eukaryotic Cells | complex living units defined by a membrane-bound nucleus and specialized, compartmentalized organelles |
| Prokaryotic Cell | a simple, single-celled organism that lacks a true nucleus and membrane-bound organelles |
| what additional structures plants cells have that animal cells do not | a cell wall , chloroplasts , a large central vacuole , plastids , and plasmodesmata |