Anatomy of an Ovule
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Questions and Answers

What is the term for the place of attachment of the funiculus with the main body of the ovule?

hilum

What is the direction of the micropyle in an anatropous ovule?

downwards

What are the two protective coverings that surround the nucellus?

outer and inner integuments

What is the term for the narrow opening at the apex of the ovule?

<p>micropyle</p> Signup and view all the answers

What is the term for the base of the ovule directly opposite to the micropyle?

<p>chalaza</p> Signup and view all the answers

What is the main function of the integuments in an ovule?

<p>Protective covering of the nucellus</p> Signup and view all the answers

What is the location of the embryo sac in an ovule?

<p>Embedded in the nucellus</p> Signup and view all the answers

What is the term for the stalk that attaches the ovule to the placenta?

<p>Funiculus</p> Signup and view all the answers

What is the characteristic of the most common type of ovule found in angiosperms?

<p>Anatropous, with micropyle directed downwards</p> Signup and view all the answers

What is the relationship between the micropyle and the chalaza in an ovule?

<p>They are at opposite ends of the ovule</p> Signup and view all the answers

Study Notes

Ovule Development and Structure

  • Each ovule develops inside the ovary and is attached to the placenta by a small stalk called funiculus.
  • The funiculus attaches to the ovule at a point called the hilum.
  • The most common type of ovule in angiosperms is anatropous, characterized by the micropyle being directed downwards and adjacent to the funiculus.
  • The ovule consists of central parenchymatous tissue, the nucellus, surrounded by two protective coverings called integuments: outer and inner integuments.
  • The micropyle is a narrow opening at the apex of the ovule.
  • The chalaza is the base of the ovule, directly opposite to the micropyle.
  • The embryo sac (female gametophyte) is an oval, multicellular structure embedded in the nucellus.

Ovule Development and Structure

  • Each ovule develops inside the ovary and is attached to the placenta by a small stalk called funiculus.
  • The funiculus attaches to the ovule at a point called the hilum.
  • The most common type of ovule in angiosperms is anatropous, characterized by the micropyle being directed downwards and adjacent to the funiculus.
  • The ovule consists of central parenchymatous tissue, the nucellus, surrounded by two protective coverings called integuments: outer and inner integuments.
  • The micropyle is a narrow opening at the apex of the ovule.
  • The chalaza is the base of the ovule, directly opposite to the micropyle.
  • The embryo sac (female gametophyte) is an oval, multicellular structure embedded in the nucellus.

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Description

Learn about the structure and components of an ovule, including the funiculus, hilum, micropyle, and integuments. Important for understanding plant reproduction and development.

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