Question

question #19
two students observe a cell under a microscope and list several characteristics in a table.
based on the characteristics, how is the cell classified?
a the cell is a bacterial cell because it contains vacuoles.
b the cell is a plant cell because it contains both a cell wall and chloroplasts.
c the cell is a protist because there is one large vacuole.
d the cell is an animal cell because the genetic material is enclosed within a nucleus.
question #20
a student observes the slides of four different cells under a microscope the observations in the table.
based on the observations, which slide most likely contains a plant cell?
a slide 1
b slide 2
c slide 3
d slide 4

Explanation:

Question #19

• Option A: Bacterial cells are prokaryotic (no true nucleus) and usually have small vacuoles (if any). The cell here has a nucleus (even if at the edge, it's a eukaryotic feature), so this is incorrect.
• Option B: Plant cells are eukaryotic. They have a cell wall (for structure), chloroplasts (for photosynthesis), a large central vacuole (for storage), and a nucleus. This matches the characteristics given, so this is correct.
• Option C: Protists are a diverse group. While some have vacuoles, the combination of cell - wall and chloroplasts is more specific to plant cells (many protists lack one or both). So this is incorrect.
• Option D: Animal cells are eukaryotic but lack a cell wall and chloroplasts. So this is incorrect.

• Slide 1: Very small, irregular shape with a small nucleus is more characteristic of an animal cell (many animal cells are relatively small and can have irregular shapes).
• Slide 2: Rectangular shape (due to the cell wall) and a large cavity (vacuole) are typical features of a plant cell. Plant cells have a cell wall that gives them a more regular (often rectangular) shape and a large central vacuole.
• Slide 3: Round shape with a visible nucleus could be an animal cell (many animal cells are round - like, e.g., some blood cells).
• Slide 4: Very small, round shape with no nuclear membrane is prokaryotic (like bacteria).

Answer:

B. The cell is a plant cell because it contains both a cell wall and chloroplasts.

Question #20