Seed Germination Quiz

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Questions and Answers

What is the function of the seed coat or testa?

  • Facilitation of gas exchange
  • Regulation of water uptake
  • Protection of the embryo (correct)
  • Nutrient storage for the seedling

In monocotyledon seeds, what structure is much reduced and modified to form the scutellum?

  • Hypocotyl
  • Endosperm (correct)
  • Seed coat
  • Embryo

What marks the end of the process of imbibition during seed germination?

  • Swelling and expansion of the seed
  • Softening of inner tissues
  • Water uptake by the seed
  • Emergence of the embryonic axis (correct)

What is the composition of a dicotyledon seed?

<p>Embryonic axis and one or more cotyledons (A)</p> Signup and view all the answers

What is the role of catabolism in metabolism?

<p>Break down molecules into smaller units and release energy (D)</p> Signup and view all the answers

What is the primary function of anabolism in metabolism?

<p>Construct molecules from smaller units (B)</p> Signup and view all the answers

What is the main purpose of metabolism in living organisms?

<p>Allow organisms to grow, reproduce, and maintain their structures (B)</p> Signup and view all the answers

What is the difference between catabolism and anabolism?

<p>Catabolism breaks down molecules, while anabolism constructs molecules (C)</p> Signup and view all the answers

How does metabolism contribute to the maintenance of life in living organisms?

<p>By facilitating the physical and chemical processes inside the cells to maintain life (D)</p> Signup and view all the answers

Flashcards

Function of seed coat/testa?

Protects the embryo within a seed.

What is the scutellum?

Modified structure in monocots specialized for food absorption from the endosperm to the embryo.

End of imbibition?

Signaled when the embryonic axis starts to emerge from the seed.

Dicotyledon seed composition?

Embryonic axis plus one or more cotyledons.

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What is catabolism?

Breaks down molecules into smaller units, releasing energy.

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What is anabolism?

Constructs molecules from smaller units.

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Main purpose of metabolism?

Allows organisms to grow, reproduce and maintain structures.

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Catabolism vs. anabolism?

Catabolism breaks down complex molecules, releasing energy; anabolism uses energy to construct complex molecules.

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How metabolism maintains life?

Facilitates physical and chemical processes to sustain life.

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Study Notes

Seed Structure and Germination

  • The seed coat, also known as the testa, functions to protect the seed from mechanical damage, drying out, and pathogens.
  • In monocotyledon seeds, the cotyledon is much reduced and modified to form the scutellum.
  • The radicle emergence marks the end of the process of imbibition during seed germination.

Seed Composition

  • A dicotyledon seed is composed of the seed coat, endosperm, and embryo.

Metabolism

  • Catabolism is the process of breaking down complex molecules into simpler ones, releasing energy in the process, and its role in metabolism is to release energy for cellular activities.
  • Anabolism is the process of building up complex molecules from simpler ones, requiring energy, and its primary function in metabolism is to synthesize new molecules and maintain cellular structures.
  • The main purpose of metabolism in living organisms is to convert energy and nutrients into the components that make up living cells.
  • The key difference between catabolism and anabolism is that catabolism breaks down molecules to release energy, while anabolism builds up molecules requiring energy.
  • Metabolism contributes to the maintenance of life in living organisms by providing energy, synthesizing new molecules, and maintaining cellular structures.

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