Gibberellic Acid and Plant Growth Quiz
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Questions and Answers

What is the unique characteristic of plant growth mentioned in the text?

  • It stops after a certain period
  • It is determined by the environment
  • It is due to the presence of meristems (correct)
  • It is limited by the plant's age

Which type of growth involves new cells being continually added to the plant body by the activity of the meristem?

  • Tertiary growth
  • Closed form of growth
  • Primary growth
  • Open form of growth (correct)

What contributes to the elongation of plants along their axis?

  • Vascular cambium and cork-cambium
  • Root apical meristem (correct)
  • Shoot apical meristem
  • Lateral meristems

In which type of plants do lateral meristems cause an increase in the girth of the organs?

<p>Dicotyledonous plants (B)</p> Signup and view all the answers

What is the role of ethylene in root growth?

<p>Promoting root hair formation (A)</p> Signup and view all the answers

How does ethephon affect fruit ripening in tomatoes and apples?

<p>It hastens fruit ripening (C)</p> Signup and view all the answers

What is the primary role of abscisic acid (ABA) in seed development?

<p>Inducing dormancy to withstand unfavorable conditions (C)</p> Signup and view all the answers

What is the effect of ABA on stomata?

<p>It stimulates stomatal closure (B)</p> Signup and view all the answers

What kind of growth is exemplified by a root elongating at a constant rate?

<p>Linear growth (B)</p> Signup and view all the answers

What does the sigmoid curve represent in the context of growth?

<p>Stationary phase (D)</p> Signup and view all the answers

Which phase of growth is characterized by rapid increase at an exponential rate?

<p>Log phase (C)</p> Signup and view all the answers

What type of cell division leads to one daughter cell continuing to divide while the other differentiates and matures?

<p>Mitotic cell division (A)</p> Signup and view all the answers

What is the main use of gibberellins in the brewing industry?

<p>Speeding up the malting process (B)</p> Signup and view all the answers

What is the effect of spraying sugarcane crops with gibberellins?

<p>Increasing stem length and yield (C)</p> Signup and view all the answers

What is the primary effect of cytokinins on plants?

<p>Having specific effects on cytokinesis (B)</p> Signup and view all the answers

Which plant response is NOT attributed to gibberellins?

<p>Promoting bolting in beet and cabbages (B)</p> Signup and view all the answers

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