1. Describe what you see, why do you think this occurs and how?

4. Or this.

5. Why did this kidney grow? compensatory hypertrophy - increase in size of an organ or part of an organ or tissue, when called upon to do additional work or perform the work of destroyed tissue or of a paired organ.

6. How did this? Become this!

7. Answer…. Cell Reproduction

8. Cell Reproduction We make 2-trillion cells a day Exact copies of each other Why cells reproduce: 1.You grow, organ/ tissues grow, cells grow 2.Some cells die or are damaged 3.Keep you healthy

9. Cell Maintainance Work of cells done by proteins Cells too large to maintain -> they divide at certain size Helps repair wounds by cell division

10. Chromosomes Cell Activity directed by DNA - DNA organized by genes (segments of DNA) which code for RNA and protein -DNA is condensed/ organized and packaged into Chromosomes Prokaryotic Cell – Single Molecule of DNA Eukarytoric Cell – condensed into Chromosomes -human has 46

11. DNA and Proteins make up Chromatin 1 st packaging -> histones (Protein) Nucleosome – histone core and DNA around it Chromsomes exist as coiled or uncoiled -condense (Chromatid) before they divide *(not tangled) Chromatid held together by Centromere.