Exploring Plant Development and Modular Structure

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Questions and Answers

Which of the following statements about plant development is true?

  • The positions and time at which plant modules are generated are not influenced by the environment.
  • Long range hormonal signals play a larger role in plant development compared to animal development.
  • The internal organization of a plant module is not genetically controlled.
  • The genetic control of pattern formation in plant development is different from animal development. (correct)

What is the main difference between plant and animal development?

  • Animals have a greater number of standardized modules compared to plants.
  • Plants have a root-shoot axis, while animals do not.
  • Plants have a more complex internal organization compared to animals.
  • Plants rely more on external cues and hormonal signals for development compared to animals. (correct)

What is the significance of the root-shoot axis in plant development?

  • It plays a larger role in plant development compared to animal development.
  • It determines the overall structure of the plant.
  • It is responsible for the generation of plant modules.
  • It influences the genetic control of pattern formation in plant development. (correct)

Which of the following is NOT true about the internal organization of a plant module?

<p>It is not influenced by external cues. (D)</p>
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What happens during embryonic development in plants?

<p>The root-shoot axis is established and then continues to grow outside the seed. (B)</p>
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Study Notes

Plant Development

  • Plants have a flexible body plan, which allows for continuous growth and adaptation to the environment.
  • The main difference between plant and animal development is that plants have an open system of growth, whereas animals have a closed system of growth.

Plant Body Organization

  • The root-shoot axis is significant in plant development as it establishes the polarity of the plant, determining the direction of growth.

Plant Module Organization

  • A false statement about the internal organization of a plant module is that it has a fixed pattern of growth.

Embryonic Development in Plants

  • During embryonic development in plants, the zygote undergoes multiple cell divisions, forming a spherical mass of cells called the proembryo.
  • The proembryo develops into the radicle (primary root) and the hypocotyl (stem), establishing the root-shoot axis.

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