Question

1. found only in plant cells, these organelles use radiant energy from the sun to rearrange carbon dioxide and water into glucose and oxygen.
2. this thin semi - permeable layer surrounds every living cell. it allows useful substances to enter the cell, blocks the entry of harmful substances and forces out waste products.

Explanation:

1. Chloroplasts are unique to plant cells and perform photosynthesis (using sunlight to convert carbon - dioxide and water into glucose and oxygen).
2. The cell membrane is a semi - permeable layer around all living cells, controlling the movement of substances in and out of the cell.

Answer:

1. Chloroplasts
2. Cell membrane