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Plant Processes
Test Description: Plant processes
Instructions: Answer all questions to get your test result.
1) Most carbon dioxide enters plants through stomata on the
A
tips of the stems
B
lower surface of leaves
C
upper surface of leaves
D
root tips
2) ____________ causes fruit to ripen
A
ethylene gas
B
gravity
C
chlorophyll
D
auxin
3) Light energy for the plant to use in making its food is trapped by
A
water
B
pigments
C
auxin
D
chlorophyll
4) The plant hormone that causes stomata to close and helps plants respond to water loss is
A
abscisic acid
B
auxin
C
gibberellin
D
cytokinin
5) Plants that require short nights to flower are called ____________ plants
A
short-day
B
periodic
C
day-neutral
D
long-day
6) Light, _____________, and carbon dioxide all affect the opening and closing of stomata.
A
gravity
B
water
C
minerals
D
insects
7) The autumn colors of tree leaves are due to _____________ in the leaves.
A
pigments
B
chlorophyll
C
carbon dioxide
D
auxin
8) The type of growth response having to do with light is called_________
A
phototropism
B
gravitropism
C
photosynthesis
D
photoperiodism
9) Which of the following describes the function of the chloroplast in plant cells?
A
It traps energy from sunlight.
B
It helps in reproduction.
C
It stores starches.
D
It regulates water content.
10) What does the outer layer of the leaf do.
A
It opens and closes the stomata
B
It transports water from the roots to the leaves.
C
It allows carbon dioxide, water, and oxygen to exit the cell.
D
It slows the loss of water.
*select an answer for all questions
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