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HomeHomework HelpbiologySymmetry and Body Plans

Symmetry and Body Plans

Symmetry in biology refers to the arrangement of body parts in organisms, which can be classified as radial symmetry, where body parts are arranged around a central axis (as seen in jellyfish), or bilateral symmetry, where the body can be divided into two mirror-image halves along a single plane (as seen in humans and most animals). Body plans describe the overall structural organization of an organism, influenced by its symmetry type.

intermediate
2 hours
Biology
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Overview

Symmetry is a fundamental concept in biology that describes how body parts are arranged in organisms. It can be classified into two main types: radial and bilateral symmetry. Radial symmetry allows organisms to interact with their environment from all sides, while bilateral symmetry provides a disti...

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Key Terms

Symmetry
A balanced arrangement of parts on either side of a central line or around a central point.

Example: A butterfly exhibits bilateral symmetry.

Radial Symmetry
A type of symmetry where body parts are arranged around a central axis.

Example: Starfish show radial symmetry.

Bilateral Symmetry
A type of symmetry where the body can be divided into two identical halves.

Example: Humans and most animals have bilateral symmetry.

Body Plan
The overall structure and arrangement of an organism's body.

Example: The body plan of a fish includes fins and a streamlined shape.

Anatomy
The study of the structure of organisms.

Example: Anatomy helps us understand how different body plans function.

Ecology
The study of interactions between organisms and their environment.

Example: Ecology examines how body plans affect survival in different habitats.

Related Topics

Animal Classification
The process of categorizing animals based on shared characteristics and evolutionary history.
intermediate
Evolutionary Biology
The study of the processes that have led to the diversity of life on Earth.
advanced
Ecological Adaptations
How organisms adjust to their environment to enhance survival and reproduction.
intermediate

Key Concepts

Radial SymmetryBilateral SymmetryBody PlansOrganism Structure