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Chapter 13.3 B
Test Description: Section 3
Instructions: Answer all questions to get your test result.
1) When chlorophyll breaks down, ___.
A
red pigments disappear
B
other pigments become visible
C
photosynthesis occurs
D
pollination occurs
2) If you plant a tree on the side of a very steep hill, it will ___.
A
bend upward because shoot tips have positive gravitropism
B
bend downward because shoot tips have positive gravitropism
C
bend upward because shoot tips have negative gravitropism
D
grow straight out
3) An example of short-day plants are ___.
A
lettuce
B
spinach
C
clover
D
poinsettias
4) An example of long-day plants are ___.
A
clover
B
poinsettias
C
ragweed
D
chrysanthemums
5) A short day plant is one that will ___.
A
flower when it experiences long days
B
flower when it experiences long nights
C
not flower when it experiences short days
D
flower at the beginning of summer
6) You can cause a chrysanthemum to flower by ___.
A
exposing it to a lot of light
B
both exposing it to a lot of light and not watering it
C
exposing it to only a few hours of light a day
D
not watering it
7) When the stomata on a leaf are open, ___ diffuses into the leaf.
A
chlorophyll
B
carbon dioxide
C
water
D
oxygen
8) Many of a plant's tropisms are in response to ___.
A
changes in day length
B
direction light
C
all of the answers
D
gravity
9) When commercial growers artificially control the length of days and nights to stimulate plants to flower, they are relying on a or an ___.
A
graitropism
B
environmental stimulus
C
phototropism
D
thigmotropism
10) A change in plant growth in response to the direction of light is called ___.
A
an evergreen
B
gravitropism
C
deciduous
D
phototropism
*select an answer for all questions
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