​Centrioles

Centrioles are found in animal cells.

Centrioles are used for animal cells to reproduce. They release long, stiff fibers called microtubules that split the cell apart during cell division. Watch this video.

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First cells on our planet were prokaryotic bacteria. They were small, simple and lacked organelles. They were simply DNA and ribosomes floating in cytoplasm surrounded by a membrane and cell wall.

Prokaryotes

​The endosymbiotic theory attempts to explain how eukaryotes evolved from prokaryotes. These cells are larger, more complex and contain membrane bound organelles like a nucleus.

Eukaryotes​

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Viruses are NOT cells. They are genetic material surrounded by a protein shell. They can evolve and are considered "non-living infection particles". They do not reproduce on their own, grow, need food, or maintain homeostasis.

Viruses

​Unit 2 Resource Page

Visit Week 4 or 5 module to find this page.

Embedded within the resource page are

1. videos,

2. CK-12 lessons,

3. answer keys, and a

4. handout from 2020-2021 to organize notes.

Focus on short (10 minutes), repetition review sessions daily, especially topics that you struggled with on the quiz.