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AP Intermediate 1st Year Plant Growth and Development — practice questions — page 2

Explore 50 free Plant Growth and Development questions in AP Intermediate 1st Year Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Plant Growth and Development questions and exercises with answers

Showing questions 31–50 of 50.

Grape growers spray a PGR to lengthen the bunch stalks. It is a:Read the answer and worked solution →Fruits ripen faster in a closed box thanks to a gas they release. The gas is:Read the answer and worked solution →In a drought a hormone closes the stomata and is called the stress hormone. It is:Read the answer and worked solution →ABA mostly acts as an antagonist of:Read the answer and worked solution →Plants that flower only when light lasts longer than a critical time are:Read the answer and worked solution →Which part of the plant senses day length?Read the answer and worked solution →Catch the growth promotersRead the answer and worked solution →Pop the ethylene jobsRead the answer and worked solution →Steer into the hormone laneRead the answer and worked solution →Slice the plant hormonesRead the answer and worked solution →Promoter or inhibitorRead the answer and worked solution →Who does whatRead the answer and worked solution →One word is wrongRead the answer and worked solution →Plant growth bingoRead the answer and worked solution →In plants, growth is best described as which kind of increase in size?Read the answer and worked solution →What is plant growth called when meristems keep adding new cells throughout life?Read the answer and worked solution →Cells in a watermelon may increase in size by up to about how many times?Read the answer and worked solution →Growth of a pollen tube is usually measured as an increase in itsRead the answer and worked solution →Thin cellulosic primary walls with abundant plasmodesmata mark cells of which phase?Read the answer and worked solution →Increased vacuolation and new cell wall deposition characterise which growth phase?Read the answer and worked solution →

Worked practice questions

Grape growers spray a PGR to lengthen the bunch stalks. It is a:

  1. Abscisic acid
  2. Ethylene gas
  3. Gibberellin
  4. Cytokinin
Show answer and solution

Correct answer: C. Gibberellin

1. Gibberellins lengthen the axis of a plant. 2. That is used on grape stalks. 3. So the spray is a gibberellin. _Source: syllabus Biology, Chapter 15, Plant Growth and Development._

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Fruits ripen faster in a closed box thanks to a gas they release. The gas is:

  1. Kinetin
  2. Zeatin gas
  3. Auxin gas
  4. Ethylene
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Correct answer: D. Ethylene

1. Ripening fruit makes large amounts of one PGR. 2. That PGR is a gas. 3. It is ethylene. _Source: syllabus Biology, Chapter 15, Plant Growth and Development._

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In a drought a hormone closes the stomata and is called the stress hormone. It is:

  1. Abscisic acid
  2. Gibberellic acid
  3. Indole acetic acid
  4. Kinetin purine
Show answer and solution

Correct answer: A. Abscisic acid

1. ABA stimulates stomatal closure. 2. It raises tolerance to many stresses. 3. So ABA is the stress hormone. _Source: syllabus Biology, Chapter 15, Plant Growth and Development._

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