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Botany Lab Exam: Roots/Stems/Wood Review
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19
Biology
12/01/2010

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Term
From which tissue do lateral roots arise?
Definition
Pericycle.
Term
Between which tissues is the vascular cambium located? (In roots)
Definition
Primary xylem and primary phloem.
Term
Which tissue of stems is not present in dicot roots"
Definition
Pith.
Term
In which tissues are root hairs found?
Definition
Epidermal tissue.
Term
Which tissue is immediately adjacent to the endodermis on the side toward the center?
Definition
Pericycle.
Term
In which region of the root does differentiation of cells into various cell types take place?
Definition
The region of maturation.
Term
What is present in cells of the cortex that gives evidence of its function as a food-storage tissue?
Definition
Starch.
Term
Of what fatty substance are Casparian strips composed?
Definition
Suberin.
Term
What tissue produces cells that add girth to the root?
Definition
Vascular cambium.
Term
What water-conducting tissue is present in the center of a dicot root?
Definition
Primary Xylem.
Term
What protects buds of dormant twigs?
Definition
Bud scales.
Term
What are bundle scars?
Definition
Tiny bumps where xylem and phloem broke when a leaf fell off.
Term
Where specifically are axillary buds located?
Definition
Immediately above the leaf base in axil, at a node.
Term
What structures associated with gas exchange are found throughout stem internodes?
Definition
Lenticels.
Term
What is the difference between bud scale scars and leaf scars?
Definition
Leaf scars at notes are where leaves fell off, bud scale scars are where terminal buds fell off and forms a girdle.
Term
Which tissue separates cortex from pith in an older alfalfa stem? What is the function of this tissue?
Definition
Vascular tissue; transport water, minerals, and food.
Term
What is the primary function of cortex and pith?
Definition
Food storage.
Term
If you saw cross sections of Begonia or Coleus and alfalfa stems side by side, what differences would be obvious?
Definition
Fundamental tissue, not pith in Begonia; vascular bundles "random" in Begonia.
Term
Which two tissues are produced by the cork cambium, and which two tissues are produced by the vascular cambium?
Definition
Cork and phelloderm; Secondary phloem and secondary xylem.