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The timing of sprouting and blooming in plants is controlled by...
feeling less sleepy when the sun rises
fight or flight
keep the seeds in a warmer location
the plant will not bloom
outside the plant (an external stimulus)
hormones
fight or flight
a hormone causes the shoots to grow in the opposite direction of gravity
When a plant turns toward sunlight, exhibiting phototropism, the hormones in the plant are responding to something
feeling less sleepy when the sun rises
fight or flight
keep the seeds in a warmer location
the plant will not bloom
outside the plant (an external stimulus)
hormones
fight or flight
a hormone causes the shoots to grow in the opposite direction of gravity
A greenhouse worker wants flower seeds to sprout in late winter. The seeds usually sprout in spring. The greenhouse worker should...
feeling less sleepy when the sun rises
fight or flight
keep the seeds in a warmer location
the plant will not bloom
outside the plant (an external stimulus)
hormones
fight or flight
a hormone causes the shoots to grow in the opposite direction of gravity
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?
feeling less sleepy when the sun rises
fight or flight
keep the seeds in a warmer location
the plant will not bloom
outside the plant (an external stimulus)
hormones
fight or flight
a hormone causes the shoots to grow in the opposite direction of gravity
Which of the following is an example of a response to something in the environment?
feeling less sleepy when the sun rises
fight or flight
keep the seeds in a warmer location
the plant will not bloom
outside the plant (an external stimulus)
hormones
fight or flight
a hormone causes the shoots to grow in the opposite direction of gravity
Which does NOT cause the leaves of a plant to turn?
feeling less sleepy when the sun rises
fight or flight
keep the seeds in a warmer location
the plant will not bloom
outside the plant (an external stimulus)
hormones
fight or flight
a hormone causes the shoots to grow in the opposite direction of gravity
All of the following are plant responses EXCEPT
feeling less sleepy when the sun rises
fight or flight
keep the seeds in a warmer location
the plant will not bloom
outside the plant (an external stimulus)
hormones
fight or flight
a hormone causes the shoots to grow in the opposite direction of gravity
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?
feeling less sleepy when the sun rises
fight or flight
keep the seeds in a warmer location
the plant will not bloom
outside the plant (an external stimulus)
hormones
fight or flight
a hormone causes the shoots to grow in the opposite direction of gravity
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