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unit 1 final assignment corrections
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unit 1 final assignment
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Review Questions1. List all the similarities and differences between prokaryotic and eukaryotic cells.
Eukaryotic cells are found in organisms while prokaryotic cells are found in bacteria and are less
complex. Prokaryotic cells do not have a nucleus and organelles while eukaryotic cells do. Eukaryotic
cells have linear strands of DNA while prokaryotic cells have smaller, circular DNA. Eukaryotic and
prokaryotic cells both have ribosomes and a cell membrane.
2. What is an organelle? Give 3 examples of common organelles and their functions.
An organelle is an organized structure given a specific task in a living cell. Chloroplasts are responsible
for photosynthesis. Lysosomes are responsible for degrading proteins and membranes and aids in
degrading materials ingested by the cell. Mitochondrion are responsible for cellular respiration.
3. What are the levels of organization, list them and give an example of an organism from each
level.
Atomic: chlorine atom, Molecular: oxygen molecule , Cellular: skin cell, Tissue: lung, Organ: liver, Organ
System: digestive system, Organism: snow leopard, Population: wolf pack, Community: a pond ,
Ecosystem: arctic ecosystem, and Biosphere: The Earth.
4. What’s the difference between a population and a community?
A population is a group of living, same species organisms while a community includes living and non-
living factors.
5. What are the characteristic of life? What does it mean to be unicellular or multicellular?
Characteristics of life:
- Composed of cells
- Reproduction
- Growth and development
- Use energy
- Respond to stimuli
- Produce waste
- Take in nutrients
Unicellular means to be single celled while being multicellular means to be composed of multiple cells.
6. In your own words describe cell specialization. Why are embryonic stem cells so important?
Cell specialization is when normal cells are changed into specialized cells where they obtain a function
and a purpose. Embryonic stem cells are so important because they can become any kind of cell that the
body needs.
7. Cell form is related to their function. What kind of function do you expect from a cell with lots of
smooth ER?
I would expect a cell with lots of smooth ER to detoxify products of natural materials.
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