Please examine the following specimens under the LIGHT microscope. Read page 285 to 287. Make a clear and colourful drawing that is at least half a page and label the parts of the specimen. Each labeled drawing is 7 marks x 5 drawings = an assignment out of 35 marks. Answer all questions for full marks
Drawings
A. LEAF X SECTION LILAC
B SYRINGA LEAF X SECTION
C. Leaf collected from outside .
1. for the leaf that you picked from outside, label the top and bottom of leaf and explain why one side is darker.
2.. Look at the cross section of leaf. Draw and label the cuticle, palisade mesophyll, spongy mesophyll, guard cell, vein.
3.. Which part of the leaf is facing the sun? Which part is in the shade?
4. What is the purpose of the stomata?
5. What is a cuticle for?
STEM
drawings:
A. monocot vs dicot
b. longitudinal section of coleus stem
1. MONOCOT VS DICOT Examine and compare the monocot and dicot stem cross section slide. Label the vascular bundles, xylem and phloem. How do you know which specimen is monocot and which is dicot? (page 285)
2. LONGITUDINAL SECTION Draw the longitudinal section. The xylem is stained red. What is the purpose of xylem?
