The cell and onion-skin cells
Answers are for parents and teachers.
1
Draw a plant cell and an animal cell in your notebook and label the parts.
Plant cell: wall, membrane, cytoplasm, nucleus, chloroplast, vacuole; the animal cell has no wall or plastids.
2
Put the words organism, organ, tissue and cell in order from smallest to largest and give an example of each level for an apricot tree.
Cell → tissue → organ → organism; for example, a stoma cell → protective tissue → leaf → apricot tree.
3
Why does a tomato change from green to red as it ripens? Use the names of plastids.
Chloroplasts turn into chromoplasts: the green chlorophyll breaks down and red pigment builds up.
4
List the steps of preparing an onion-skin slide in order (6–7 steps).
Water drop; thin skin; iodine drop (teacher); cover glass; soak up excess water; view with the small objective; view with the large objective.
5
Explain the job of the cytoplasmic membrane in your own words.
It surrounds and protects the cell and lets needed substances through selectively.