Download Biol 212 Worksheet: Cell Specialization

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Biol 212 Worksheet:
Cell Specialization
Supplemental Instruction
Iowa State University
Biology 212 (2)
1. REVIEW: Describe phototropism. Include details about the experiments conducted.
2. Differentiate between cells, tissues, organs and systems.
3. What are the four types of animal tissue? Briefly describe each.
4. What is the difference between a zygote and an embryo?
5. What are stem cells? How is their population maintained? What are the different types?
6. What are the 6 basic cell processes involved in development? Apply these to limb
development in humans.
7. Why is are cells different from one another? Is their DNA different? What factors can
signal gene expression?
8. What are the advantages of model organisms? What species serve as model organisms?
9. Describe how drosophila embryos form a posterior end and an anterior end? What can
cause two tail regions? Two head regions?
10. What are the differences between gap genes, pair-rule genes, and segment-identity genes?
11. TEST QUESTION: Short arms are most likely to come from what?
a. Low rate of migration
c. Incomplete apoptosis
b. No cell differentiation
d. Excess division of cells
12. TEST QUESTION: T/F: Humans are good model organisms to study since they have
relatively long life spans and are able to report the effects of various treatments.
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