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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?

Dicotyledonous plants Signup and view all the answers

What is the role of ethylene in root growth?

Promoting root hair formation Signup and view all the answers

How does ethephon affect fruit ripening in tomatoes and apples?

It hastens fruit ripening Signup and view all the answers

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

Inducing dormancy to withstand unfavorable conditions Signup and view all the answers

What is the effect of ABA on stomata?

It stimulates stomatal closure Signup and view all the answers

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

Linear growth Signup and view all the answers

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

Stationary phase Signup and view all the answers

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

Log phase 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?

Mitotic cell division Signup and view all the answers

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

Speeding up the malting process Signup and view all the answers

What is the effect of spraying sugarcane crops with gibberellins?

Increasing stem length and yield Signup and view all the answers

What is the primary effect of cytokinins on plants?

Having specific effects on cytokinesis Signup and view all the answers

Which plant response is NOT attributed to gibberellins?

Promoting bolting in beet and cabbages Signup and view all the answers