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Worksheetsplant form and function AP
Total questions: 12
Worksheet time: 12mins
Name
Class
Date
1.
Which of the following processes is responsible for the bending of the stem of a plant toward a light source?
a)
The amount of chlorophyll produced on the side facing the light increases
b)
The rate of cell division on the side facing the light increases
c)
The rate of cell division on the side away from the light increases
d)
The cells on the side of the stem away from the light elongate
2.
Which of the following mechanisms is most important in the movement of water from root to leaves in the xylem?
a)
gravity
b)
root pressure
c)
transpiration
d)
osmosis
3.
Hydrogen bonding plays a particularly important role in which plant process?
a)
Bulk flow of solutes from source to sink
b)
Photoperiodism resulting in flowering
c)
Attraction of the sperm and egg
d)
The transpiration-cohesion-tension mechanism
4.
How does the sperm of flowering plants reach the egg?
a)
Via a pollen tube that grows from the pollen grain through the carpel tissues to the egg
b)
Via raindrops of a dew film that allows the sperm to swim from the male plant to the female plant
c)
Usually via an insect, which places sperm in the ovary while probing for nectar
d)
By actively swimming down though the style to the egg
5.
Which of the following plant structures will become the seed?
a)
flower
b)
embryo
c)
ovule
d)
ovary
6.
Select the activity that does not occur in a signal transduction pathway
a)
Activation of the receptor by a relay molecule
b)
Expression of specific genes
c)
Activation of protein kinases
d)
Phosphorylation of transcription factors
7.
In plants, translocation, the movement of solutes in the phloem, occurs as a result of
a)
A difference in water potential between a sugar source and a sugar sink
b)
Evaporation of water through the stomata
c)
Cohesion of water molecules to each other and adhesion to the transport tubes
d)
Release of auxin in response to loss of water in the xylem
8.
In a root, a vessel element completes its development in which area of growth?
a)
zone of elongation
b)
root cap
c)
zone of differentiation
d)
apical meristem
9.
Pinching off the tops of snapdragons causes the plants to make many more flowers than they would have if they would if left alone. Why does the removal of the top cause more flowers to form?
a)
Removal of an apical meristem causes a phase transition from vegetative to floral development
b)
Removal of an apical meristem allows the periderm to produce new lateral branches
c)
Removal of an apical meristem allows more nutrients to be delivered to floral meristems
d)
Removal of an apical meristem causes outgrowth of lateral buds that produce extra branches, producing flowers
10.
What would enhance water uptake by a plant cell?
a)
Positive pressure on the surrounding solution
b)
Decreased water potential of the surrounding solution
c)
An increase in pressure exerted by the cell wall
d)
The loss of solutes from the cell
11.
Movement of phloem sap from a source to a sink
a)
occurs throughout the apoplast of sieve-tube elements
b)
may translocate sugars from the breakdown of stored starch in a root up to developing shoots
c)
depends on tension, or negative pressure potential
d)
depends on pumping water into sieve tubes at the source
12.
How may a plant respond to severe heat stress?
a)
By orienting leaves to increase evaporative cooling
b)
By producing ethylene
c)
By increasing the proportion of unsaturated fatty acids in cell membranes, reducing their fluidity
d)
By producing heat-shock proteins, which may protect the plant’s proteins from denaturing
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