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Biology Keystone Unit 1Basic Biological Principles Study online at quizlet.com/_x29nf asexual reproduction Type of reproduction that does not involve gametes; offspring are clones of parents. 2. biology The scientific study of life 3. cell The basic unit of structure and function for all living organisms. 4. chloroplast An organelle found in plant cells where photosynthesis occurs. 5. chromosomes A single piece of coiled DNA contains genes that encode traits. deoxyribonucleic acid (DNA) A biological macromolecule that carries genetic information. endoplasmic reticulum (ER) transportation center of the cell. 8. eukaryote Complex cells that contain a nucleus and membrane bound organelles. 9. extracellular Located outside a cell 10. Golgi apparatus packages proteins for transport 11. intracellular Located inside the cell 12. mitochondrion site of cellular respiration powerhouse of the cell 13. Multicellular Made up of more than one cell 14. nucleus Contains DNA Controls all activities of the cell. 15. organ composed of tissues serving a common function. 16. organelle Tiny cell parts 17. organism a living thing 18. organ system composed of a group of organs that work together to perform a specific function or task. plasma membrane controls the movement of materials in and out of the cell through active or passive transport. 20. prokaryote A single-celled organism that lacks a membrane-bound nucleus and specialized organelles. 21. ribosome Site of protein synthesis makes proteins 22. science A body of evidence-based knowledge gained through observation and experimentation related to the natural world and technology. sexual reproduction Type of reproduction involving two different gametes (i.e., sperm and egg). species organisms capable of reproduction that results in fertile offspring. 1. 6. 7. 19. 23. 24. 25. tissue composed of cells organized to perform a similar function. 26. Unicellular Made up of a single cell