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Stimulus And Response Practice
Test Description: Stimulus and response practice 7.13A/B
Instructions: Answer all questions to get your test result.
1) A student is investigating variables that affect plant growth. When the student turns a potted plant on its side the stem...
A
continues to grow horizontally
B
bends and grows upward-phototropism
C
withers and dies
D
bends and grows downward-gravitropism
2) Which of the following is an example of a response to something in the environment?
A
eating less food in response to a stomachache
B
drinking water when thirsty
C
yawning when tired
D
feeling less sleepy when the sun rises
3) The timing of sprouting and blooming in plants is controlled by...
A
nutrients
B
nerves
C
water and warmer temperatures
D
hormones
4) Which of the following is an example of positive geotropism in a plant?
A
a seedling's roots grown downward in response to gravity
B
a plant's leaves turn toward the sun as it moves
C
a seedling grows out of the soil in response to sunlight
D
a seed begins to sprout in response to warmer temperature
5) A greenhouse worker wants flower seeds to sprout in late winter. The seeds usually sprout in spring. The greenhouse worker should...
A
keep the lights on at all times
B
keep the seeds in darkness until they sprout
C
keep the seeds in a warmer location
D
keep the lights on for several hours after sunset
6) What causes most seeds to open and begin sprouting?
A
farmers must open the seeds before they plant them
B
pressure from the roots pushing into the soil opens the seeds
C
the sun heats them, and they open
D
cells inside the seed grow and push the seed open
7) A farmer plants seeds six inches deep in the soil. When the seedlings emerge, what will cause the young shoots to grow upward and out of the soil?
A
a hormone causes the shoots to grow in the opposite direction of gravity
B
a hormone causes the shoots to grow in the direction of gravity
C
light causes the shoots o produce hormones that make them grow
D
light causes the shoots to grow toward the sun
8) When a plant turns toward sunlight, exhibiting phototropism, the hormones in the plant are responding to something
A
inside and outside the plant
B
inside the plant (an inside stimulus)
C
outside the plant (an external stimulus)
D
none of these
9) A certain plant needs short days and long nights before it will bloom. If it is planted where nights and days are equal, what will probably happen?
A
the plant will bloom constantly
B
the plant will not bloom
C
the plant will stop growing
D
the plant will bloom in the mornings
10) Which does NOT cause the leaves of a plant to turn?
A
light
B
gravity
C
touch
D
fight or flight
11) All of the following are plant responses EXCEPT
A
hydrotropism
B
geotropism
C
phototropism
D
fight or flight
*select an answer for all questions
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