Station 1: Observing Stomata

(p.630-633)

Materials:

Clear plastic (cellophane) tape slides microscope nail polish leaf

Procedure:

  1. Obtain a leaf. Draw what your leaf looks like. Label the parts of a leaf including the petiole, blade, axillary bud, vein.
  1. Paint a 1 x 2 cm oval of clear fingernail polish on the bottom of the leaf, avoiding ribbed veins.
  1. While the paint is drying, answer the questions at the bottom of the page.
  1. After the polish has dried it can be peeled off quite easily. Use clear cellophane tape to make a quick and foolproof mount as follows: Simply place the tape on the polish (which is still on the leaf) and gently lift the polish replica off of the leaf. Place your tape on the microscope slide.
  1. Observe under high power. Draw your field of view. Label the guard cell and stomata.

Ocular lens magnification: ______

Objective lens magnification: _____

Total magnification: ______

Questions:

  1. What are the functions of leaves?
  1. What is the function of the stomata on leaves?
  1. What factor regulates the opening and closing of stomata?
  1. Are stomata more likely to be open or closed on a hot day? Explain your answer.

Station 2 - Flower Dissection

(p. 644-648)

Materials:

fresh flower forceps razor blade paper towel scissors microscope

Procedure:

  1. Examine your flower carefully. Make a detailed sketch of the flower you observed. Be sure to label the petals, stamen, anther, filament, pistil, ovary, stigmaandstyle. Note whether the anthers are above or below the stigma.

Questions:

  1. What is an angiosperm?
  1. The ovary develops into what structure?
  1. Using the textbook, define fruit.
  1. What is the purpose of gibberellins?
  1. What is the purpose of Ethylene?
  1. What is the purpose of Cytokinins
  1. What is the purpose of Auxins?

Station 3 - Observation of Leaf Cells

(p. 630-633)

Materials:

Prepared slide of Ligustrum (privet leaf) microscope

Procedure:

  1. View the cross section of the Ligustrum or privet leaf under the microscope.
  1. Labelthe following parts on your high power diagram: epidermis, spongy mesophyll, palisade mesophyll, vein, and chloroplast.

Data:

Ocular lens magnification: ______

Objective lens magnification: _____

Total magnification: ______

Questions

  1. In which layers does photosynthesis take place? What is the difference between these layers? What kind of tissue is this made of?
  1. What kind of tissue are the veins composed of? What are the two types and what do they transport?

Station 4 –

(618-619)

Create a T-Chart to compare and contrast parenchyma, collenchyma, and sclerenchyma tissues. Include things like structure and function, special characteristics and where you may find them within a plant.