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7th Grade Science - Stimulus and Response, Xylem and Phloem, Wilting - Turgor Pressure

Quiz by Carolina Carner

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22 questions
Show answers
  • Q1
    Which of the following shows how the plant above would grow if the pot were knocked on its side and left for several weeks assuming light is not a factor?
    Question Image
    D
    C
    A
    B
    30s
  • Q2
    The pictures above show a turgor pressure demonstration using stalks of celery in different salt solutions. The difference between S and T is a result of which of the following forces?
    Question Image
    S demonstrates more turgor pressure because of forces causing growth towards the sun.
    T demonstrates more turgor pressure because of water pressure inside the cells.
    T demonstrates more turgor pressure because of forces causing growth towards the sun.
    S demonstrates more turgor pressure because of water pressure inside the cells.
    30s
  • Q3
    Many plants are known to turn toward a stimulus. Sunflowers are known for their ability to track the movement of the sun. This behavior is known as
    Thigmotropism
    Gravitropism
    Hydrotropism
    Phototropism
    30s
  • Q4
    The process of photosynthesis requires a lot of energy. By dropping their leaves in autumn, trees can preserve much of their energy and nutrients to make it through the long winter months. Which external stimulus causes trees to respond to the coming winter?
    Animals begin collecting seeds and nuts produced by the tree
    Other plants begin to drop leaves and go dormant
    Length of daylight becomes shorter
    Nutrient-producing bacteria that live in the soil begin to die off
    30s
  • Q5
    Organisms can respond to external stimuli in their environment internally. Which of the following correctly identifies an external stimulus that triggers an internal response?
    Being frightened causes muscles to tense
    Hunger causes eating food
    Thirst causes drinking water
    Fever causes sweating
    30s
  • Q6
    A student waters a plant every day with the correct amount of water to ensure the plant’s survival. After watering daily, he completely covers the plant with a dark box containing a 2 cm hole on one side of the box. How will the plant respond?
    The plant will bend toward sunlight.
    The plant will grow and lift up the box.
    The plant will wilt and eventually die.
    The plant will experience no change.
    30s
  • Q7
    An organism migrates due to a change in nutrient levels within the environment. The organism is responding to
    reproduction
    internal stimuli
    external stimuli
    30s
  • Q8
    Which of the following is an example of an organism’s response to an internal stimulus in order to maintain homeostasis?
    A rabbit runs and hides from a predator
    A bird forages for food because it feels hungry
    A bat hibernates in winter to conserve energy
    The temperature of a plant increases in the sun
    30s
  • Q9
    An organism is thirsty so it tries to find water. This is an example of
    Hydrotropism
    A response to internal stimuli
    An immune response
    30s
  • Q10
    Blood sugar levels change in the body causes a students stomach to growl. Is the blood sugar levels changing an example of internal or external stimuli?
    internal
    external
    30s
  • Q11
    If you turn a light on pupils of the eye will quickly dilate (shrink). Turning the lights on is an example of which stimulus?
    external
    internal
    30s
  • Q12
    Touching a hot stove and you move your hand quickly away is an example of what kind of stimulus?
    external
    internal
    30s
  • Q13
    A dog is thirsty so he goes and drinks some water is an example of what kind of stimulus?
    external
    internal
    30s
  • Q14
    Bob is hungry so he eats 3 slices of pizza is an example of internal or external stimuli?
    internal
    external
    30s
  • Q15
    A Touch Me Not plant closes in response to
    touch
    light
    gravity
    30s

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