Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
A flower is the reproductive part of a plant, arising from the axil of a leaf-like structure called the bract.
The flower is attached to the stem by a stalk called the pedicel. The swollen tip of the pedicel is the thalamus or receptacle.
Calyx: The outermost whorl consisting of green leaf-like structures called sepals. They protect the flower in the bud stage and perform photosynthesis ( production).
Corolla: The second whorl consisting of brightly colored petals. Their primary function is to attract insects for pollination.
Androecium (Male Part): The third whorl consisting of stamens. Each stamen is made of a thread-like filament and a knob-like anther which contains pollen grains.
Gynoecium/Pistil (Female Part): The innermost whorl consisting of carpels. Each carpel has a stigma (sticky landing for pollen), a style (tube), and an ovary containing ovules.
Complete Flower: A flower that contains all four whorls (e.g., Hibiscus). An incomplete flower lacks one or more whorls.
Bisexual Flowers: Contain both male (Androecium) and female (Gynoecium) reproductive parts. Unisexual flowers contain only one.
📐Formulae
💡Examples
Problem 1:
Identify the part of the flower that turns into a fruit after fertilization and the part that turns into a seed.
Solution:
Ovary Fruit; Ovule Seed.
Explanation:
After fertilization, the ovary wall thickens and ripens to become the fruit, while the ovules inside the ovary develop into seeds containing the embryo.
Problem 2:
If a flower has only the Androecium and lacks the Gynoecium, what type of flower is it?
Solution:
Unisexual male flower (Staminate flower).
Explanation:
Flowers that contain only one reproductive whorl are called unisexual. Since it only has the male part (Androecium), it is specifically a staminate flower.
Problem 3:
Write the chemical equation for the process occurring in the green sepals of a flower.
Solution:
Explanation:
Green sepals contain chlorophyll and can perform photosynthesis, represented by the synthesis of glucose () from carbon dioxide () and water ().