20 Questions
Which part of the flower serves to attract pollinators to the plant?
Petal
What is the male part of the flower consisting of the anther and filament?
Stamen
What is the top portion of the style and the receptive surface for pollen grains?
Stigma
What is the enlarged lower portion of the style enclosing the ovule(s)?
Ovary
What is the function of the stigma in a flower?
To receive pollen grains
Which part of the flower bears the anther and connects it to the flower?
Filament
What is the primary purpose of the ovary in a flower?
To enclose the ovules and become a fruit after maturation
What is the role of the corolla in a flower?
To protect other floral parts in the bud stage
What is the difference between staminate and carpellate flowers?
Carpellate flowers bear only female sex parts, while staminate flowers bear only male sex parts
What are some characteristic features of insect-pollinated flowers?
Exerted anthers and deposition of pollen on visiting insects
What is the function of the micropyle in a dicot seed?
To allow water to enter for germination
What is the term used to describe a seed that has no separate existence of the endosperm?
Exalbuminous seed
What is the role of the testa in a dicot seed?
Provides protection to the seed
In a dicot seed, what is the name of the long scar along the notch which marks the point of attachment to the seed stalk?
Hilum
What is the name for the two fleshy cotyledons in a bean seed that enclose the nutritive endosperm during embryonic development?
Cotyledons
What is the primary function of the hypocotyl in a seed?
It becomes the stem of the plant
What is the main role of the endosperm in a maize seed?
It contains protein granules and starch-laden cells
What is the function of aleurone layer in the maize grain?
It secretes digestive enzymes during seed germination
Which part of the embryo is partially covered and protected by colerorhiza and coleoptile?
Plumule
What is the primary purpose of the scutellum in a maize grain?
Secrete digestive enzymes during seed germination
Study Notes
Flower Structure and Function
- The petals of a flower serve to attract pollinators to the plant.
- The male part of the flower, consisting of the anther and filament, is called the stamen.
- The stigma is the top portion of the style and is the receptive surface for pollen grains.
- The ovary is the enlarged lower portion of the style, enclosing the ovule(s).
- The stigma's function is to receive pollen grains.
Floral Organs
- The filament is the part of the flower that bears the anther and connects it to the flower.
- The ovary's primary purpose is to produce seeds and fruit.
Floral Function
- The corolla's role is to attract pollinators and protect the reproductive organs.
Flower Types
- Staminate flowers are male flowers, while carpellate flowers are female flowers.
- Insect-pollinated flowers often have characteristic features such as brightly colored petals, strong scents, and nectar-rich rewards.
Seed Structure and Function
- The micropyle is the small opening in a dicot seed where the pollen tube enters during fertilization.
- Exalbuminous seeds are those that have no separate existence of the endosperm.
- The testa is the seed coat that protects the seed and regulates water uptake.
Seed Development
- The hilum is the long scar along the notch that marks the point of attachment to the seed stalk in a dicot seed.
- The cotyledons are the two fleshy leaves that enclose the nutritive endosperm during embryonic development in a bean seed.
Embryo Development
- The hypocotyl is the region of the embryo that connects the cotyledons to the root and shoot.
- The endosperm's main role is to provide nutrients to the developing embryo in a maize seed.
- The aleurone layer is responsible for secreting enzymes to break down the endosperm during seed germination.
Embryonic Protection
- The colerorhiza and coleoptile partially cover and protect the embryo.
Maize Grain Structure
- The scutellum is a specialized region of the embryo that absorbs nutrients from the endosperm during seed germination.
Test your knowledge of the parts of a flower and their functions with this quiz. Learn about the pedicel, receptacle, sepal, petal, and more as you explore the fascinating world of plant pollination.
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