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Problem 1
Most of the growth of a plant body is the result of
a. Cell differentiation
b. Morphogenesis
c. Cell division
d. Cell elongation
Problem 2
The innermost layer of the root cortex is the
a. Core
b. Pericycle
c. Endodermis
d. Pith
Problem 3
Heartwood and sapwood consist of
a. Bark
b. Periderm
c. Secondary xylem
d. Secondary phloem
Problem 4
The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by
a. A change in the morphology of the leaves produced
b. The initiation of secondary growth
c. The formation of lateral roots
d. The activation of floral meristem identity genes
Problem 5
Suppose a flower had normal expression of genes A and C and expression of gene B in all four whorls. Based on the ABC hypothesis, what would be the structure of that flower, starting at the outermost whorl?
a. Carpel-petal-petal-carpel
b. Petal-petal-stamen-stamen
c. Sepal-carpel-carpel-sepal
d. Sepal-sepal-carpel-carpel
Problem 6
Which of the following arise(s), directly or indirectly, from meristematic activity?
a. Secondary xylem
b. Leaves
c. Dermal tissue
d. All of the above
Problem 7
Which of the following would not be seen in a cross section through the woody part of a root?
a. Sclerenchyma cells
b. Parenchyma cells
c. Sieve-tube elements
d. Root hairs
Problem 8
On this cross section from a woody eudicot, label a growth ring, late wood, early wood, and a vessel element. Then draw an arrow in the pith-to-cork direction.