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Get a learning target sheet from up front 3/9
• I can describe how growth and development are related to cell division, growth, and signaling
• I can describe how cells become specialized for specific functions
Agenda
• Ch 13 Notes 1 • Short Video & Practice activity• Finish Notes 1• Short video & Practice activity
Cell cycle
• Interphase (90% of the time): cell is not dividingG1 (cell gets bigger)S (DNA replication)G2 (More organelles made, getting ready to
divide)
• Mitosis: cell division
Gastrulation Animation
• http://www.youtube.com/watch?v=8v6cXkzlEQA
Foldable
• Label the organism in each of the stages we’ve talked about– Zygote– Embryo– Blastula– Gastrula– Neurula
• If you move a cell it will become the same type of cell as its new “neighbors” because of these chemical signals
Becomes a nerve cell
Becomes a stomach cell
Becomes a skin cell
Stem Cells
• Stem cells: cells that have not become specialized yet
• Scientists are interested in stem cells because they can be turned into many types of other cells
Stem cell controversy
• One method of researching embryonic stem cells will kill the embryo
• BUT researchers are working to change this
Video: Metamorphosis Examples
• Metamorphosis• http://www.teachersdomain.org/asset/tdc02_
vid_metamorph/