8 Questions
What is the main function of the ovary?
Developing into seeds after fertilization
What does placentation refer to?
The arrangement of ovules within the ovary
In what type of placentation are ovules attached along a central column?
Axile placentation
What does the pericarp of a fruit refer to?
The part that surrounds the seed
What happens after fertilization in relation to the ovary?
The ovary develops into seeds
Which type of placentation forms a ridge along the ventral suture of the ovary?
Marginal placentation
What is the main role of placentation in a plant's reproductive system?
Arranging ovules for successful seed development
What does the false septum in an ovary signify?
The division of the ovary into chambers
Study Notes
Placenta in Flowers
- Placenta is the region where ovules are attached to the ovary wall
- Ovary is the female reproductive organ in flowers, and it can be one-chambered or two-chambered
- In some flowers, the placenta is along the ventral suture of the ovary, and ovules are arranged in a row (marginal placentation)
- In other flowers, the placenta is axial and ovules are attached to a multicellular ovary (axial placentation)
Types of Placenta
- Marginal placentation: ovules are arranged in a row along the ventral suture of the ovary
- Axial placentation: ovules are attached to a multicellular ovary
- Free-central placentation: ovules are attached to a central column in the ovary
- Paracentral placentation: ovules are attached to the ovary wall, but not along the ventral suture
Fruit Development
- After fertilization, the ovary develops into a fruit
- The pericarpe (fruit wall) can be dry or fleshy
- Each ovule develops into a seed, and each seed has an embryo and a stored food supply
- The fruit can have different types of placentation, depending on the type of ovary and ovule arrangement
Ovary Structure
- The ovary can be one-chambered or two-chambered
- The ovary wall has a placenta where ovules are attached
- The ovary can have different types of placentation, depending on the arrangement of ovules
- The ovary develops from a floral meristem, which is a group of undifferentiated cells
Test your knowledge of plant anatomy with a quiz focusing on the female reproductive part of a flower. Questions cover topics such as the structure and functions of the ovary, style, stigma, and ovule.
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