Question

learn: activity
investigate the microscopic structure of various plant materials. to do this, prepare tiny, thin slices of plant specimens, using a single - edged razor blade. (take care not to injure yourself with the blade.) keep the slices in a container of water until you are ready to observe them. to observe a specimen, place it into a drop of water on a clean microscope slide and cover it with a cover - slip. use the microscope and view the specimen using low - and high - power magnifications. observe near the edges where your section of tissue is most likely to be one cell thick. add a drop of dilute methylene blue or iodine - potassium - iodide stain, and note if any additional structures become visible. how are the microscopic structures of the plant specimens similar to the human tissues you observed?
how are they different?

learn: activity
prepare a wet mount of the amoeba and paramecium by putting a drop of culture on a clean glass slide. gently cover with a clean coverslip. observe the movements of the amoeba with pseudopodia and the paramecium with cilia. try to locate cellular components such as the cell membrane, nuclear envelope, nucleus, mitochondria, and contractile vacuoles. describe the movement of the amoeba.
describe the movement of the paramecium.

Explanation:

1. Movement of Amoeba: Amoeba moves by extending pseudopodia, which are temporary, finger - like projections of the cell membrane. These pseudopodia attach to the surface and pull the rest of the cell forward.
2. Movement of Paramecium: Paramecium moves by the coordinated beating of cilia, which are hair - like structures covering its body. The cilia beat in a wave - like motion, propelling the Paramecium through the water.
3. Similarities between plant and human tissues at microscopic level: Both plant and human tissues are made up of cells. They both have a cell membrane that controls the movement of substances in and out of the cell, and a nucleus that contains genetic material.
4. Differences between plant and human tissues at microscopic level: Plant cells have a rigid cell wall outside the cell membrane, which provides structural support and protection. Human cells do not have a cell wall. Plant cells also often have large central vacuoles for storage and maintaining turgor pressure, which are not as prominent in human cells.

Answer:

• Movement of Amoeba: Moves by extending pseudopodia.
• Movement of Paramecium: Moves by coordinated beating of cilia.
• Similarities between plant and human tissues: Both have cells with cell membranes and nuclei.
• Differences between plant and human tissues: Plant cells have cell walls and large central vacuoles, human cells do not.