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Worksheets3.5 Plant Responses and Growth
Total questions: 14
Worksheet time: 3hrs 16mins
Name
Class
Date
1.
pg. 119 A plant's growth towards or away from a stimulus is called a
a)
tropism
b)
hormone
c)
auxin
d)
dormancy
2.
pg. 119 Thigmotropism is a response to
a)
sound
b)
light
c)
touch
d)
smell
3.
pg. 119 (gravity) How might the roots of a plant grow in space without gravity?
a)
only down
b)
only up
c)
all directions
d)
only sideways
4.
pg 120 What do we call a chemical that effects how plants grow and develop?
a)
hormone
b)
auxin
c)
photoperiodism
d)
cnl
5.
pg. 120 What hormone speeds up the rate at which a plant's cells grow?
a)
hormone
b)
auxin
c)
darknessium
d)
visuals
6.
pg. 121 (key concept) The amount of darkness a plant receives determiners what in many plants?
a)
time of flowering
b)
time of reproducing
c)
time of eating
d)
time of wilting
7.
pg. 121 A plant's response to seasonal changes in the length of night and day is called
a)
midnight
b)
photoperiodism
c)
hormone
d)
auxin
8.
pg. 121 The number of hours of darkness that dertmines wether or not a plant will flower is called
a)
hormone
b)
irises
c)
lettaceism
d)
critical night length
9.
pg. 121 (FIGURE 2) What is an example of a "Short-day plant"?
a)
Pointsettias
b)
Irises
c)
Dandelions
d)
Rice
10.
pg. 121 (FIGURE 2) What is an example of a "Long-day plant"?
a)
Pointsettias
b)
Irises
c)
Dandelions
d)
Rice
11.
pg. 121 (FIGURE 2) What is an example of a "Day-neutral plant"?
a)
Pointsettias
b)
Irises
c)
Dandelions
d)
lettuce
12.
pg. 122 A period where an organism's growth or activity stops is called
a)
night
b)
dormancy
c)
day
d)
zzz... zzz...
13.
pg. 122 (key concpet) Dormancy helps plants survive freezing temperatures and the lack of
a)
liquid water
b)
frozen water
c)
moonlight
d)
air
14.
Why do the leaves of some trees change color in autumn?
a)
The chlorophyll in the leaves is breaking down.
b)
The chlorophyll in the leaves is growing.
c)
The plant is old.
d)
The plant is dying.
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