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- 1. Multiple Choice
What did scientists observe using the earliest microscopes?
atoms
cell parts
molecules
tiny organisms
- 2. Multiple Choice
In what decade did the cell theory become an accepted part of biology?
1620s
1850s
1940s
1980s
- 3. Multiple Choice
What major improvement came with the development of the scanning electron microscope?
Magnets were replaced with lighter materials.
It produced images with better color.
The magnification was higher.
The images were three dimensional.
- 4. Multiple Choice
Both Schwann and Virchow developed important theories about cells in the mid 1800s. Which best explains the reason these theories were made within a few years of each other?
Hooke’s Micrographia inspired both theories.
New microscopes provided better viewing of cells.
Scientists invented the microscope in the mid 1800s.
The electron microscope was used for the first time
- 5. Multiple Choice
An electron microscope can magnify an object about 500,000 times. How does this magnification compare with the magnification of a compound light microscope?
500 times lower
100 times lower
100 times higher
500 times higher
- 6. Multiple Choice
Which is present only in eukaryotic cells?
cell membrane
chromosomes
DNA
nucleus
- 7. Multiple Choice
Which statement is true about bacterial cells?
The cells are very large.
The cells have no nucleus.
They are eukaryotes.
They have organelles.
- 8. Multiple Choice
Which statement is a fundamental principle of the cell theory?
All cells have a plasma membrane.
Eukaryotic cells are larger than prokaryotic cells.
Living organisms are composed of cells.
The genetic material in cells is DNA.
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