Regarding microscopy, what is the definition of resolution?

• A theory being proven incorrect due to imaging

• How clear an image of a substance is

• How fast a microorganism moves underneath a light microscope

• How magnified an object is

The same unicellular organism was viewed under a light microscope (D) and a scanning electron microscope (E).

What is the reason for the difference in quality in their images?

• Light cannot pass through the specimen.

• Higher magnification can be achieved with the electron microscope.

• The resolution of the electron microscope is higher.

• Samples are stained with methylene blue when viewed with the light microscope.

The micrograph of a section through a plant stem shows at least ten different types of cells. What explains the differences between these cells?

• Only one gene is expressed in each cell type

• Different genes are expressed in each cell type

• Only useful genes remain in the DNA of each cell type

• Changes in the DNA sequence take place when these cells develop

Tags

NGSS.MS-LS1-5

NGSS.MS-LS3-1

What is a reason for the differences between the two micrographs?

• The lower image has a higher magnifiation

• The lower image has a greater resolution

• A nucleus can only be seen in the upper image

• The upper image is an electron micrograph

Tags

NGSS.MS-LS4-2

The image shows a micrograph of the AlphaHerpes virus, a 70 nm virus with a capsule cover.

Why would it be better to use an electron microscope to view the Alphaherpesvirus and its capsule, rather than a light microscope?

• 70 nanometers is too small to be viewed by a light microscope

• Electron microscopes have greater resolution

• Electron microscopes have greater magnification

• All answers are correct

Deduce the type of cell in the micrograph and why.

• Eukaryote, has a cell wall

• Eukaryote, the cell is smaller than a prokaryote would be

• Prokaryote, no compartmentalization

• Prokaryote, the cell membrane is only found in prokaryotes

Tags

NGSS.MS-LS1-1

What is the lighter shaded area inside the prokaryote?

• Ribosomes

• Flagella

• Nucleus

• Nucleoid Region

Tags

NGSS.MS-LS1-2

What is the function of the nucleoid region?

• ATP production

• Protein Synthesis

• Storing Genetic Information (DNA)

• Attachment

Tags

NGSS.MS-LS1-2

What are the string-like projections off of the prokaryotic cell?

• Endoplasmic Reticulum

• Pili

• Flagella

• Ribosomes

What is the function of flagella?

• Movement

• Storing Energy

• Producing ATP

• Storing Genetic Information