Question

you compare your drawing with the model, text picture or another leaf as required by your instructor. Exercise 3 Root Cross Section Examine the microscope slide containing the monocot and dicot root cross sections. Compare your cross section to the text diagram and the model. Find all the structures required. Draw and label each, side-by-side, so that visual comparisons can be made. Make sure the different cell and tissue types are distinguishable ie., when your instructor looks at your drawing, he will be able to tell which is xylem, phloem, cortex, etc. Write a short paragraph or construct a table comparing the two cross-sections as required by your instructor. Exercise 4 Stem Cross Section Examine the microscope slide containing the monocot and dicot stem cross sections. Compare your cross section to the text diagram and the model. Find all the structures required. Draw and label each, side-by-side, so that visual comparisons can be made. Make sure the different cell and tissue types are distinguishable ie, when your instructor looks at your drawing, he should be able to tell what is xylem, phloem, cortex, vascular bundle etc. Observe and compare the tree cross section to your slide. Write a short paragraph or construct a table comparing the three as required by your instructor. Exercise 5 Seeds Examine the bean and corn seeds and find all the parts labeled in your text and given by your instructor. Write a short paragraph, construct a table and make drawings comparing the seed structures and functions as required by your instructor. Rvercise 6 Whole Plant
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Answer 1

Answer. In roots, whether it is of dicot or monocot, the epidermal cells are stretched to form the root hairand the endodermis shows the presence of casparian strips. The vascular bundles will be exarch means xylem away from pith and phloem near pith.

In dicot roots, the vascular bundles ranges from tetrarch to hexarch means 4 to 6 in number. Pith is not well developed. Vascular cambium is present that helps in doing the secondary growth and helps in increasing the diameter of the roots. Kindly observe the cellular diagram of it:

T. S. Dicot root-cellular

Whereas, in monocot root the vascular bundles are many means polyarch condition is there. No vascular cambium means no secondary growth.

T. S. Of monocot root-cellular

STEM:

The stem contains endarch vascular bundles means xylem faces the pith and phloem away from it.

In dicot, the stem contains numerable vascular bundles arranged in a ring, pith is well defined and vascular cambium is present leading to secondary growth and increasing the diameter of the stem.

T. S. OF DICOT STEM-DIAGRAMMATIC

In monocot stem, the vascular bundles are scattered and many in number, thus no pith. No vascular cambium, means no secondary growth.