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