Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
The Seed Coat is the tough, protective outer covering of a seed that protects the internal embryo from injury and drying out.
Cotyledons (Seed Leaves) are the parts of the seed that store food for the developing baby plant. Based on this, seeds are classified as Monocots (one cotyledon) or Dicots (two cotyledons).
The Embryo is the baby plant found inside the seed. It consists of two main parts: the Radicle, which grows downward to become the root, and the Plumule, which grows upward to become the shoot.
The Micropyle is a tiny pore on the seed coat that allows and (Oxygen) to enter the seed during the initial stages of germination.
Germination is the process by which a seed grows into a seedling. It requires specific conditions: Water (), Air (), and a suitable temperature (Warmth).
📐Formulae
💡Examples
Problem 1:
Identify the type of seed (Monocot or Dicot) for a Maize grain and a Pea seed.
Solution:
Maize is a Monocot; Pea is a Dicot.
Explanation:
A Maize grain has only one cotyledon, whereas a Pea seed can be easily split into two equal halves, indicating it has two cotyledons.
Problem 2:
What is the specific function of the Micropyle when a seed is soaked in ?
Solution:
Absorption of water and gases.
Explanation:
The micropyle acts as a gateway. When a seed is placed in , the liquid enters through this tiny hole, making the seed coat soft and activating the embryo.
Problem 3:
If a seed is kept in a refrigerator with plenty of and , will it germinate?
Solution:
No, it will not germinate.
Explanation:
Germination requires an optimal temperature (Warmth). The low temperature inside a refrigerator inhibits the enzymes required for the embryo to grow.