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Terms in this set (42)
What manufactures ribosomes?
What is an example of a fundamental principle of the cell theory?
Living organisms are composed of cells.
A scientist at the polar ice cap was studying an ice sample from hundreds of meters below the surface. While examining the ice, the scientist found some cells from many years ago. Using an electron microscope, the scientist identified these cell structures: a cytoskeleton, mitochondrion, nucleus, cell wall, and ribosomes. What kind of organism did the scientist find?
Cilia and flagella are used to move cells through watery environments. What role do these cells parts play on stationary cells?
They move substances along the surface of the cell.
Which scientist first used the term cell?
The advantage of a compound-light microscope over an electron microscope is that it_______________________.
can view living microscopes
What would be the result if the electro microscope had not been invented?
Microscope magnification would be limited to 1000x.
At what point in the process of diffusion is dynamic equilibrium reached?
When there is continuous movement but no change.
What did scientists observe using the earliest microscopes?
In what structure would you find a nucleus?
What is a protein fiber that forms the cell's supporting network?
What organelle converts sugars into energy?
What is present only in eukaryotic cells?
What defines a cell?
the basic unit of living things
Chloroplasts are organelles that convert light energy to sugars. These organelles are found only in plants. Which organelles are found only in animals?
Both Schwann and Virchow developed important theories about cells in the mid 1800s. What best explains the reason these theories were made within a few years of each other?
Scientists invented the microscope in the mid 1800s.
While viewing a slide rapidly moving sperm cels, a student concludes that these cells require a large amount of energy to maintain their activity. What organelles provide this needed energy?
In what decade did the cell theory become an accepted part of biology?
What characteristics of the plasma membrane is illustrated in this drawing?
Which is a structure common to all cells, prokaryotic and eukaryotic?
What organelle is called the "powerhouse of the cell"?
What cell organelle contains coded directions for production of proteins?
What statement is true about bacterial cells?
The cells have no nucleus.
What organelle produces protein for a cell?
How can the cytoskeleton of a cell be described?
framework and anchor for organelles
Algae cells are placed in an isotonic solution. Additional amounts of solutes are slowly added to the solution. What happens to the cells?
They will shrink.
What organelle is found in plant cells but absent in animal cells?
The central structure that defines the cell is called the...
Substances that move wastes and other materials through the plasma membrane are called...
The scientist who first named cells was...
Large, complex c pls that contain a nucleus are called...
The spread of a drop of food dye throughout a glass of milk is called...
The organelles that allow a unicellular paramecium to sweep food toward its mouthlike opening are called...
The bacterium E. coli is a type of cell called...
What produces protein for the cell?
What acts as a distribution center for cell proteins?
What breaks down excess microtubules?
What controls cell division?
Unwanted substances would build up in the cell without this organelle?
What contains the cell's DNA?
What transforms energy for the cell?
What produces proteins?
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