Suppose that you are asked to observe a micrograph of a leaf cross section and distinguish between the upper and lower epidermis. How would you make this decision?

How will you compare the cells from the inner part of the “stem” cross section to the cells located near the epidermal cells?

two leaves A and B, each having the petiole in a closed test tube full of water. Each is hung on a spring balance. Leaf A has a waxy cuticle on the upper epidermis and stomata on the lower epidermis. Leaf B a waxy cuticle on the upper epidermis and a lower epidermis covered with petroleum jelly. Both leaves were cut from the same plant.    i)Explain why it is important for the leaves to be cut from the same plant. (ii) List TWO variabes that must be kept constant in this investigation. iii) Table 6 shows the results obtained in the experiment:   leaf and test tube weight final weight  change in weight  A 40.7 39.9 0.8 B 38.7 38.7 0.0 Explain why the weight of set up A, decreased.  iv) Using your biological knowledge, indicate how results will change, if a fan is switched on near the experimental set up. Explain your answer.

Plant epidermal cells may form root and leaf hairs. What is the roles of these structures?

Describe the lower and upper epidermises of a young langka leaf.

Label the lily leaf epidermis with the ff:  Stomatal pores Guard cells Subsidiary cells Ordinary epidermal cells (pavement cells)

What is the role of root and leaf hair of plant epidermis

Which of the following is a true statement? (Check all that apply) A The epidermis forms from the ectodermal domain that is not exposed to BMP inhibitors. B The epidermal stem cell divides symmetrically and one of the daughter-cells goes on to differentiate into a keratinocyte. C) Epidermal cells move upward as they become more and more differentiated. D After the division of the basal cell, the daughter-cell that expresses Notch remains a stem cell. E The integrin-laminin interaction prevents the basal cell from differentiating. F The basal cell divides parallel to its apical-basal axis. G Cells found in the lower layers of the developing skin are more differentiated than the ones found in the upper layers. H p63 is a proliferation factor while Jagged is the true differentiation signal for keratinocytes. I Jagged is a proliferation signal while p63 is the true differentiation factor for keratinocytes. Epidermal signals like Fgf7, FGF10 and TGF-alpha promote the differentiation of the…

The Casparian strip prevents apoplastic movement through the epidermal cells of the stem. True or False?

Briefly discuss the origin and function of sebum