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Chapter 35: Plant Structure, Growth, and Development
 
Pre-Test
 

Pre-Test


1 .       Root hairs are important to a plant because they _____. (Concept 35.1E-Book) [Hint]

 protect the plant from freezing
 protect the plant from soil microbes
 develop into lateral roots
 increase the surface area for absorption
 help the root slide between soil particles
2 .       Which of the following is correctly matched with its tissue system? (Concept 35.1E-Book) [Hint]

 xylem ... ground tissue system
 phloem ... epidermis
 cortex ... ground tissue system
 pith ... vascular tissue system
 none of the above


3 .       Most of the photosynthesis in a plant occurs in the _____ cells of the leaves. (Concept 35.1E-Book) [Hint]

 collenchyma
 water-conducting
 parenchyma
 sclerenchyma
 sugar-conducting
4 .       How do cells in a meristem differ from cells in other types of plant tissue? (Concept 35.2E-Book) [Hint]

 They continue to divide.
 They photosynthesize at a faster rate.
 They are growing.
 They are differentiating.
 They store food.
5 .       The primary growth of a plant adds _____ and secondary growth adds _____. (Concept 35.2E-Book) [Hint]

 height ... girth
 branching ... flowers
 girth ... height
 branching ... girth
 height ... branching
6 .       Wood is composed primarily of _____. (Concept 35.2E-Book) [Hint]

 primary xylem
 primary phloem
 secondary xylem
 secondary phloem
 plant fibers
7 .       Other than the transport of materials, what is another function that vascular tissue performs in a leaf? (Concept 35.3E-Book) [Hint]

 The tissue contains the cells that perform photosynthesis.
 The tissue contains a labyrinth of air spaces that allow for gas exchange.
 The tissue functions as a skeleton that reinforces the shape of the leaf.
 The tissue regulates the opening and closing of pores in stomata complexes.
 None of the above.
8 .       Cell division in the vascular cambium adds to the girth of a tree by adding new _____ to the layer's interior and _____ to the layer's exterior. (Concept 35.4E-Book) [Hint]

 phloem ... xylem
 xylem and phloem ... bark
 pith ... xylem and phloem
 xylem ... phloem
 xylem ... cortex
9 .       Cellular differentiation is responsible for _____. (Concept 35.5E-Book) [Hint]

 cell division in the apical meristem
 elongation of cells in the zone of elongation of a root
 one daughter cell becoming a sieve tube while the other becomes a companion cell
 only one daughter cell remaining meristematic when a vascular cambium cell divides
 The first two answers are correct.
10 .       At which level in the hierarchy of plant structure is the polarity of a plant determined? (Concept 35.5E-Book) [Hint]

 whole plant body
 organs
 tissues
 cells
 Because of their developmental plasticity (a plant's response to the environment), plants do not exhibit polarity.





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