Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
Related questions
Question
What structures are labeled 1 in the diagrams?
What structure is labeled 2 in the diagrams?
What is labeled 3 in both diagrams?
What is labeled 4 in the diagrams?
What is labeled 5 in the diagrams?
Transcribed Image Text:**Figure Explanation: Seed Structure of Monocotyledon vs Dicotyledon**
This image illustrates the structural differences between monocotyledon and dicotyledon seeds using corn and bean as examples.
### (a) Monocotyledon (Corn)
1. **Endosperm (1)**: The tissue that provides nutrition to the developing seedling.
2. **Aleurone Layer (2)**: The outermost layer of the endosperm, rich in proteins.
3. **Pericarp (3)**: The outer covering of the seed, derived from the ovary wall.
4. **Scutellum (Cotyledon) (4)**: Absorbs nutrients from the endosperm to feed the embryo.
5. **Embryo (5)**: The young plant itself, consisting of a shoot and root.
### (b) Dicotyledon (Bean)
1. **Cotyledons (1)**: Two seed leaves that store food and provide nutrients to the seedling.
2. **Seed Coat (2)**: Protects the seed from physical damage and pathogens.
3. **Micropyle (3)**: The small opening for water absorption during germination.
4. **Embryo (4)**: Contains the future plant, including embryonic root and shoot.
5. **Hilum (5)**: The scar marking where the seed was attached to the inner fruit wall.
6. **Plumule (6)**: The embryonic shoot will develop into the first true leaves.
The diagram helps in understanding the main anatomical distinctions between monocotyledon and dicotyledon seeds, focusing on their specific components crucial for the germination and growth process.
Expert Solution
Step 1: Defination of monocot and dicot?
The plant seeds which have only one cotyledon are known as monocot.
The plant seeds which have two cotyledons are known as dicot.
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