BSCS Biology: A Molecular Approach

Chapter 11: Plant Growth and Development

Chapter Test

1.
What is the purpose of the endosperm?
A)to store starches, proteins, and lipids until photosynthesis can begin
B)to fertilize nonflowering plants
C)to signal the cotyledons to begin photosynthesis
D)to supply nutrients to the developing embryo
2.
Which of the following is not an example of an adaptation that signals evolution by natural selection?
A)An apple seed germinates only after it experiences several weeks of cold followed by warmer temperatures.
B)All the seeds of a certain species of conifer are infected by an invasive microorganism that prevents the seeds from germinating.
C)A desert plant's seeds germinate only after a heavy rainfall.
D)A low-growing forest plant's seeds germinate only after a forest fire.
3.
What type of seed is shown in the figure?

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A)a dicot
B)an apical
C)a monocot
D)a conifer
4.
Which of the following is not a root function?
A)to penetrate the soil and anchor the plant
B)to absorb water needed for photosynthesis
C)to carry on photosynthesis before the leaves form
D)to absorb nutrients needed for photosynthesis
5.
Which plant structure is hydrophobic?
A)root cap
B)cuticle
C)phloem
D)xylem
6.
Which of the following is responsible for secondary growth?
A)apical meristem
B)pericycle
C)bud
D)cambium
7.
PGRs that encourage plant growth include ____.
A)auxins, cytokinins, and gibberellins
B)auxins, ethylene, and cytokinins
C)abscisic acid, ethylene, and gibberellins
D)abscisic acid, auxins, and cytokinins
8.
How are PGRs that inhibit cellular activities helpful to a plant?
A)They inhibit only stem growth, while encouraging root development making plants more stable in sandy soil.
B)They help plants survive times of environmental stress, such as drought.
C)They help keep plant tissues from aging.
D)They keep tall plants from growing taller and force them to produce fruit or flowers instead.
9.
What is a trophism?
A)growth toward a stimulus
B)growth away from a stimulus
C)growth toward or away from a stimulus
D)growth when no stimulus is present
10.
What controls photoperiodism?
A)length of uninterrupted light to the plant
B)combination of number of hours of light and temperature
C)the intensity of the light during critical daytime hours
D)length of uninterrupted dark to the plant
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