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Do Now

Do Now. How does a paramecium move? How does a euglena move? What are the differences between a euglena and an amoeba? How does a volvox move?. Agenda 02/07. New seating UNCC Observation on this week EXPECTATIONS Science Fair Projects are really late!!!

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Do Now

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  1. Do Now How does a paramecium move? How does a euglena move? What are the differences between a euglena and an amoeba? How does a volvox move?

  2. Agenda 02/07 • New seating • UNCC Observation on this week • EXPECTATIONS • Science Fair Projects are really late!!! • Several students will present today; today is the last day to earn the points for presentation. • Take your project home today or it belongs to me!!! If you did a nice job, I would like to show the students next year. • Science Notebook Check on 02/09 • Protists Open Notebook Test Today • You can work with the people you are grouped with if needed. • Introduction to Cell Reproduction

  3. Asexual Reproduction Offspring and genes come from one parent Exact same genes, no variation. Very common in plants (leaves/stem) and bacteria, not so common in animals(cuts, scrapes, etc)

  4. Sexual Reproduction Creation of new organism from two parents Because organism is getting its genes from two parents, the genes are not the same. Very common in plants and animals

  5. Asexual or sexual? Coral fungi-infected bdelloidrotifier.

  6. Asexual or sexual?

  7. Question!!! What would we look like if we were reproduced asexually?

  8. CHECK FOR UNDERSTANDING! Which statement is FALSE about sexual reproduction? 1. One cell arises from another cell. 2. A cell receives its genes from two parents. 3. A cell receives its genes from one parent. 4. 1 and 3 are both FALSE.

  9. What is cell division?

  10. What is cell division? Cell division is the separation of one cell into two. Also called fission.

  11. Why? • There are three purposes to cell division. CD is GRREAT!!!

  12. 1. Growth • Organisms start out as a single cell that divides to become a larger organism. • Cells do not get bigger in order to make an organism get bigger; they divide.

  13. Example: Sea Urchin • Sea Urchin Embryo • Adult Sea Urchin:

  14. 2. Reproduction • When cells divide, they form two new cells. This is the way that some organisms (unicellular) reproduce. • Example: E. Coli

  15. 3. Repair • Cells can divide in order to repair tissue or other parts of an organism that are broken. • Example: A starfish can regenerate (regrow) an arm.

  16. CHECK FOR UNDERSTANDING! Which statement is FALSE about cell division? 1. Cell division results in two cells from one cell. 2. DNA is copied after cells divide 3. Multi-celled organisms use cell division to grow. 4. One-celled organisms use cell division to reproduce.

  17. How do organisms use cell division? • One-celled organisms: • Use cell division for asexual reproduction • Multi-celled organisms: • Use cell division for growth, cell replacement, repair

  18. Exit ticket • What are the two types of cell division? • A. One-celled, multi-celled • B. One-celled, unicellular • C. Multi-celled prokaryotic • D. Unicellular eukaryotic • Another word for cellular division is: • A. Fusion • B. Fission • C. Future • D. Fitness • Some organisms are able to reproduce ___________, meaning that they get the EXACT SAME genes from their parent. • A. Sexually • B. Fissionly • C. Asexually • D. Both sexually and asexually • What are the three purposes for cell division? • True or false: Cells do not get bigger in order to make an organism get bigger; they divide.

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