Which organelle would you expect to find in the cells of a fern, but not in a flatworm?

chloroplast **my choice
nucleus
ribosome
mitochondria

agree.

Chloroplast

To determine which organelle is found in the cells of a fern but not in a flatworm, we need to understand the characteristics and functions of each organelle mentioned.

1. Chloroplast: This organelle is responsible for photosynthesis, which allows plants to convert sunlight into energy. Chloroplasts contain the green pigment called chlorophyll and are typically found in plant cells.

2. Nucleus: The nucleus is sometimes referred to as the "control center" of the cell. It contains the cell's DNA and regulates cell activities such as growth, metabolism, and reproduction. Nuclei are found in both plant and animal cells.

3. Ribosome: Ribosomes are involved in protein synthesis. They are responsible for assembling amino acids to form proteins. Ribosomes are present in both plant and animal cells.

4. Mitochondria: Mitochondria are often called the "powerhouses" of the cell. They generate energy by producing ATP through cellular respiration. Mitochondria are found in both plant and animal cells.

Given the information above, we can conclude that the organelle you would expect to find in the cells of a fern, but not in a flatworm, is the chloroplast. Flatworms belong to the animal kingdom and do not perform photosynthesis like plants do. Hence, they lack chloroplasts.