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