Plant Growth and Movement
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Questions and Answers

What type of movement occurs in plants due to changes in turgor pressure of certain sensitive cells?

  • Hyponasty
  • Tropic movements
  • Variation movements (correct)
  • Nutation
  • What is the term for the everyday changes in turgor pressure in the pulvinus that cause bean plants to lower their leaves in the evening and raise them in the morning?

  • Sleep movements (correct)
  • Paratonic movements
  • Rapid movements
  • Nutation
  • What causes the leaflets of the sensitive plant Mimosa to fold together when touched?

  • Rapid loss of turgor pressure (correct)
  • Rapid gain of turgor pressure
  • Increase in pulvinus size
  • Decrease in pulvinus size
  • Which type of movement is characterized by the zig-zag movement of the growing tip of the young stem?

    <p>Nutation</p> Signup and view all the answers

    What is the term for the growth movements that occur in response to unidirectional external stimuli?

    <p>Tropic movements</p> Signup and view all the answers

    What is the term for the development in the lower surface area of the leaf in bud condition that is more than that of the upper surface area?

    <p>Hyponasty</p> Signup and view all the answers

    What is the term for the growth or turning movement of a plant in response to an environmental stimulus?

    <p>Tropic movement</p> Signup and view all the answers

    Which part of the plant exhibits negative geotropism?

    <p>Shoots</p> Signup and view all the answers

    What type of tropic movement is caused by the unilateral stimulus of some chemicals?

    <p>Chemotropism</p> Signup and view all the answers

    What is the result of thigmotropism in plant organs?

    <p>Curvature and coiling</p> Signup and view all the answers

    Which of the following plant parts exhibit positive hydrotropism?

    <p>Roots</p> Signup and view all the answers

    What is the direction of growth of pollen tubes dictated by?

    <p>Chemical gradient</p> Signup and view all the answers

    What is the primary characteristic of autonomic movements in plants?

    <p>They are simultaneous and spontaneous.</p> Signup and view all the answers

    What is an example of movements of locomotion in plants?

    <p>Cyclosis in plant cells.</p> Signup and view all the answers

    Which of the following is NOT a type of autonomic movement?

    <p>Tropism.</p> Signup and view all the answers

    What is the result of unequal growth on two sides of plant organs?

    <p>Growth movements.</p> Signup and view all the answers

    What is the first step in plant movement?

    <p>Perception.</p> Signup and view all the answers

    Which of the following is an example of epinasty?

    <p>Movement of leaves and petals.</p> Signup and view all the answers

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