To determine which additional observation Alyssa is most likely to make, let's first consider the characteristics of plant cells and animal cells:
- Plant Cells:
- Have a cell wall
- Have a rectangular shape
- Contain chloroplasts (for photosynthesis)
- Have a large central vacuole
- Have a cell membrane
- Animal Cells:
- Do not have a cell wall, only a cell membrane
- Usually have a round or irregular shape
- Do not contain chloroplasts
- Generally have a prominent nucleus
- Have several small vacuoles instead of one large central vacuole
Now, let's apply this knowledge to Alyssa's observations:
- Cell X:
- Has a cell wall
- Shaped like a rectangle
- Has several organelles
Because Cell X has a cell wall and a rectangular shape, it is likely a plant cell. Therefore, Cell X probably has chloroplasts as well, which are typical of plant cells. Additionally, we know plant cells have both a cell wall and a cell membrane.
- Cell Y:
- Has a round shape
- Has a large nucleus
- Has ribosomes
Given that Cell Y is round in shape and has a large nucleus, it is likely an animal cell. Animal cells do not have chloroplasts, and they have a cell membrane but no cell wall.
Thus, the most likely additional observation Alyssa will make is that Cell X, being a plant cell, has chloroplasts, and Cell Y, being an animal cell, does not.
Therefore, the correct answer is:
[tex]\[ \text{Cell } X \text{ has chloroplasts, and Cell } Y \text{ does not.} \][/tex]
