Grade 7 Cells and Organization Practice Test

Correct answer: A

The correct answer is How large the specimen appears through the microscope.

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: Magnification enlarges the image but does not change the specimen itself.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: B

The correct answer is The ability to distinguish two close points as separate details.

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: Higher resolution allows a viewer to see nearby structures as distinct rather than blurred together.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: C

The correct answer is To increase contrast so structures are easier to see.

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: A stain can make cell parts stand out against the background and improve visibility.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: D

The correct answer is The visible area becomes smaller..

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: Higher magnification shows a smaller portion of the specimen in greater detail.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: A

The correct answer is A slide prepared with a drop of liquid containing the specimen.

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: A wet mount uses liquid to hold or support a specimen beneath the coverslip.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: B

The correct answer is The actual size or distance represented in the image.

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: A scale bar allows measurements in the image to be related to real dimensions.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: C

The correct answer is The coarse adjustment knob at low magnification.

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: Starting with low power and coarse focus makes it safer and easier to locate the specimen; fine focus can follow.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: D

The correct answer is The sample contained many round cells with dark centers at 400x magnification..

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: The observation describes visible structures and the magnification without adding unsupported opinion.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: A

The correct answer is The model may show major structures but cannot represent every cell process at once..

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: Models simplify systems, so they are useful for some features but cannot show every detail or dynamic process.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.

Correct answer: B

The correct answer is The sample may contain plant cells with cell walls and chloroplasts..

1. Identify the cell concept: Determine whether the question asks about cell theory, an organelle, a cell type, transport, microscopy, or levels of organization.
2. Match structure and function: Thick boundaries and green chloroplasts are evidence consistent with plant cells, but the conclusion should remain appropriately limited.
3. Check the evidence: Use the described structure, process, or observation to select the scientifically supported answer.