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cell structure

Cell Structure

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Biology
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Diploid to Haploid Kamlesh Oza Biology Teacher Fiesta Academy Introduction All living things must reproduce to survive. All body or somatic cells reproduce by mitosis which is simple cellular reproduction. All sex cells must reduce their chromosome number as they divide. This reduction division is called meiosis and changes the chromosome number from Diploid to Haploid. Each offspring resulting from the combination of haploid sex cells will contain the same chromosome number as their parents. The Big Picture Mitosis Meiosis somatic (body) cells sex cells (sperm or egg) 2N Diploid 2N 2N 2N 2N

Biology Review (Chapters 1 - 4)

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cell structure
Chapter 1 Common Characteristics of Life  composed of cells  highly organized  exchanges energy with the environment  responds to stimuli  reproduces itself  evolves over time  adapts to environment  maintains homeostasis 7 characteristics common to life 1. Cells and organization: organisms maintain an internal order – simplest is the cell 2. Energy use and metabolism: to maintain internal order, energy is needed. Energy is utilized in chemical reactions collectively known as metabolism 3. Response to environmental changes: organisms react to environmental changes to increase chances of survival 4. Regulation and homeostasis: organisms regulate cells and body to maintain homeostasis – relatively stable internal conditions
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