Question

1. onion cell. you see the cell membrane (m), the cell wall (w), the nucleus (n) and what is (c)?
2. spirogyra cell, which is a plant - like protist. antony van leeuwenhoek was a fabric merchant from holland. although he did not invent the microscope, he improved the microscopes of his day by increasing the magnification. in 1674, he observed algae and many swimming protists in a drop of water. these unicellular organisms live in pond water and this one performs photosynthesis. (l) is pointing to chlorophyll, which plants use to make energy. what is (w)?
3. ameba, which is an animal - like protist. what is the large white organelle?
4. leaf cells. notice not all plant cells are square. (s) is an opening the plant uses to breathe. (v) is pointing to vein cells. some cells have pink dots in them. what organelles are these? remember what cell this is
5. wood cells. do you notice any organelles? ________ these are dead cells that help to support the tree.
6. bone cells. (a) are bone cells, which secrete a chemical making them strong. (b) is a vein which carries nutrients and takes away debris.
7. brain cells. nerve cells are branched to carry and receive messages.

Explanation:

• For the onion cell, if no other information about (C) is given, it could be cytoplasm which fills the cell and contains organelles.
• In the Spirogyra cell, (W) could likely be the cell wall which provides structure and support to the plant - like protist.
• For the ameba, the large white organelle is likely the nucleus which controls the cell's activities.
• In leaf cells, the pink dots are likely chloroplasts as they are in plant cells and are often visible and involved in photosynthesis.
• Wood cells are dead and usually lack typical organelles as they are mainly for structural support. So the answer for the organelle question is no.

Answer:

• 2. Cytoplasm
• 3. Cell wall
• 4. Nucleus
• 5. Chloroplasts
• 6. No
• 7. (No question to answer in this part)
• 8. (No question to answer in this part)