bio practice test

Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigations resulted in the current cell theory. Which statement describes component of the original cell theory that was removed because of new scientific knowledge?

• Cells form through spontaneous generation.

• All living things are made of cells.

• Cells are the basic structural and functional units of life.

• All cells come from other preexisting cells.

A friend tells you a story of how she saw flies emerge from rotting garbage and explains that the garbage produced the flies. What part of the cell theory could you use to explain why she is incorrect?

• Cells form through spontaneous generation.

• Cells are the basic unit of structure and organization.

• All living things are made of cells.

• All cells come from preexisting cells.

The cell theory has existed for over 200 years. Why is it not a law by now?

• There isn't enough experimental evidence to make it a law.

• It takes 400 years for a theory to be considered a law.

• A theory does not become a law.

• Not all scientists agree with the cell theory.

What aspect of the cell theory was created based on Robert Hooke's discovery through a primitive microscope?

• The cell is the basic unit of life.

• All living cells contain a nucleus.

• All cells must contain DNA.

• Cells only arise from the division of pre-existing cells.

Tags

NGSS.MS-LS1-1

A scientist is trying to examine a specimen in great detail. Which microscope would be used if they are wanting to see inside the organelles?

• Compound Light Microscope

• Dissecting Microscope

• Scanning Electron Microscope

• Transmission Electron Microscope

Julia is looking at a single-celled organism under a scanning electron microscope (SEM). Which of the following images BEST shows what Julia might see?

• 
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• 
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Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Juan was trying to figure out if the live amoeba that his lab was researching had a nucleus. They said he could check, but that it was a rare amoeba and they needed to keep it alive. Should he use a compound light microscope or an electron microscope if he wants to figure this out and why is that the best choice for him?

• He should use the compound light microscope because they have a higher magnification than the electron microscope.

• He should use a compound light microscope because the electron microscope requires preparations that kills the specimen.

• He should use the electron microscope because the light microscope requires preparation that kills the specimen.

• He should use the electron microscope because they have a higher magnification than the light microscope.

What is one disadvantage of the light microscope that is used within your science classroom?

• Specimen have to be stained for viewing.

• Higher magnification results in lower resolution of the specimen.

• Living specimens cannot be observed with a light microscope.

• They are less expensive to obtain and easier to use.

The concept map shown describes a particular type of cell. Which cell type correctly completes the concept map?

• Plant cell

• Prokaryotic cell

• Virus cell

• Animal cell

Chlorophyta are a group of single-celled organisms that live in freshwater and saltwater ecosystems. Structures inside chlorophyta cells include nuclei, chloroplasts, mitochondria, endoplasmic reticula, and vacuoles.

Which word best describes chlorophyta cells?

• synthetic

• prokaryotic

• eukaryotic

• inorganic