Stimulus And Response Practice Question Preview (ID: 40115)


Stimulus And Response Practice 7.13A/B. TEACHERS: click here for quick copy question ID numbers.

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 bloom in the mornings
d) the plant will stop growing

When a plant turns toward sunlight, exhibiting phototropism, the hormones in the plant are responding to something
a) inside the plant (an inside stimulus)
b) outside the plant (an external stimulus)
c) inside and outside the plant
d) none of these

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) light causes the shoots to grow toward the sun
b) a hormone causes the shoots to grow in the direction of gravity
c) a hormone causes the shoots to grow in the opposite direction of gravity
d) light causes the shoots o produce hormones that make them grow

What causes most seeds to open and begin sprouting?
a) the sun heats them, and they open
b) farmers must open the seeds before they plant them
c) cells inside the seed grow and push the seed open
d) pressure from the roots pushing into the soil opens the seeds

A greenhouse worker wants flower seeds to sprout in late winter. The seeds usually sprout in spring. The greenhouse worker should...
a) keep the seeds in a warmer location
b) keep the lights on at all times
c) keep the seeds in darkness until they sprout
d) keep the lights on for several hours after sunset

Which of the following is an example of positive geotropism in a plant?
a) a plant's leaves turn toward the sun as it moves
b) a seedling grows out of the soil in response to sunlight
c) a seedling's roots grown downward in response to gravity
d) a seed begins to sprout in response to warmer temperature

The timing of sprouting and blooming in plants is controlled by...
a) nerves
b) hormones
c) nutrients
d) water and warmer temperatures

Which of the following is an example of a response to something in the environment?
a) yawning when tired
b) drinking water when thirsty
c) feeling less sleepy when the sun rises
d) eating less food in response to a stomachache

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

Which does NOT cause the leaves of a plant to turn?
a) light
b) gravity
c) touch
d) fight or flight

All of the following are plant responses EXCEPT
a) phototropism
b) hydrotropism
c) geotropism
d) fight or flight

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