Podcast Beta
Questions and Answers
What is the term for the arrangement of sepals or petals where one margin overlaps each other in one direction?
Which part of the stamen produces pollen?
What is the function of the stigma in the female reproductive part of a flower?
In which type of placenta does the ovule develop at the central axis of the ovary?
Signup and view all the answers
What is the term for the male reproductive organ in a flower?
Signup and view all the answers
In vexillary arrangement, which petal overlaps the other two?
Signup and view all the answers
What characterizes an actinomorphic flower?
Signup and view all the answers
Which term refers to flowers that contain both androecium and gynoecium?
Signup and view all the answers
In a perigynous flower, what is the position of the ovary?
Signup and view all the answers
What does a flower being ebracteate signify?
Signup and view all the answers
Which of the following terms describes petals that are fused together?
Signup and view all the answers
What defines a flower as asymmetrical?
Signup and view all the answers
What is the defining characteristic of a tetramerous flower?
Signup and view all the answers
In which type of flower is the ovary described as superior?
Signup and view all the answers
Study Notes
Flower Structure
- Typical flowers feature four whorls: calyx, corolla, androecium, and gynoecium.
- Calyx and corolla are accessory organs; androecium and gynoecium are reproductive organs.
Flower Types
- Bisexual Flowers: Contain both androecium and gynoecium.
- Unisexual Flowers: Contain either androecium or gynoecium.
Symmetry Types
- Actinomorphic (Radial Symmetry): Can be divided into two equal halves through any plane.
- Zygomorphic (Bilateral Symmetry): Divided into two halves through one specific plane.
- Asymmetrical: Cannot be divided into equal halves.
Floral Appendage Variations
- Trimerous: Floral appendages in multiples of 3.
- Tetramerous: Floral appendages in multiples of 4.
- Pentamerous: Floral appendages in multiples of 5.
Presence of Bracts
- Bracteate: Possesses bracts.
- Ebracteate: No bracts present.
Flower Position Classification
- Hypogynous: Gynoecium is the highest; ovary is superior.
- Perigynous: Ovary in the center; other parts at the same level; ovary is half inferior.
- Epigynous: Thalamus encloses the ovary; other parts above; ovary is inferior.
Flower Parts
- Calyx (Sepals): Protects buds; can be gamosepalous (united) or polysepalous (free).
- Corolla (Petals): Brightly colored; can be gamopetalous (united) or polypetalous (free).
Aestivation Types
- Valvate: Margins touch without overlap.
- Twisted: One margin overlaps in one direction.
- Imbricate: Margins overlap in both directions.
- Vexillary: In five-petal flowers, the largest petal overlaps the others.
Androecium
- Male reproductive organ consisting of stamen (filament and anther).
- Sterile stamen is called a staminode.
- Anther typically bilobed with two pollen sacs per lobe.
Gynoecium
- Female reproductive part formed by carpels.
-
Carpel Structure:
- Style: Connects stigma to ovary.
- Stigma: Receives pollen.
- Ovary: Contains ovules.
Placentation Types
- Marginal: Placenta along the ventral suture; ovules on the ridge.
- Axile: Ovules attached in a multilocular ovary.
- Parietal: Ovules on the inner walls of the ovary.
- Free Central: Ovules on a central axis; no septa.
- Basal: Placenta at the base with a single ovule.
Monocotyledon
- Reference to a group of flowering plants with one cotyledon in the seed.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the fundamental structure and symmetry of flowers, including the four whorls, accessory and reproductive organs, and radial symmetry.
