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Questions and Answers
What percentage of animal species are classified as vertebrates?
What percentage of animal species are classified as vertebrates?
What is the primary characteristic of eukaryotic cells?
What is the primary characteristic of eukaryotic cells?
What type of symmetry is characteristic of humans?
What type of symmetry is characteristic of humans?
What is the primary function of the excretory system?
What is the primary function of the excretory system?
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What type of signal is used for communication in animals?
What type of signal is used for communication in animals?
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What type of behavior is acquired through experience and environment?
What type of behavior is acquired through experience and environment?
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Study Notes
Classification of Animals
- Kingdom Animalia: multicellular, eukaryotic, heterotrophic organisms
- Divided into two main groups:
- Invertebrates (without backbone): 95% of animal species
- Vertebrates (with backbone): 5% of animal species
Characteristics of Animals
- Multicellularity: composed of multiple cells
- Eukaryotic cells: cells with true nucleus and membrane-bound organelles
- Heterotrophy: obtain energy by consuming other organisms or organic matter
- Ability to move: most animals have the capacity for movement
- Sensory capabilities: respond to stimuli from environment
Body Structure of Animals
- Symmetry:
- Radial symmetry: body parts arranged around a central axis (e.g., starfish)
- Bilateral symmetry: body parts arranged on either side of a central axis (e.g., humans)
- Body cavity:
- Coelom: fluid-filled cavity between body wall and digestive system
- Pseudocoelom: fluid-filled cavity between body wall and digestive system, but not lined by mesoderm
- Body systems:
- Nervous system: receives and processes information
- Circulatory system: transports oxygen and nutrients
- Digestive system: breaks down and absorbs nutrients
- Excretory system: removes waste products
Animal Behavior
- Types of behavior:
- Instinctual behavior: innate, unlearned behaviors
- Learned behavior: acquired through experience and environment
- Social behavior: interactions with other animals
- Communication methods:
- Visual signals: body language, coloration
- Auditory signals: sounds, vocalizations
- Chemical signals: pheromones, scent markings
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Description
Learn about the classification of animals, their characteristics, body structure, and behavior. This quiz covers the basics of animal biology, including types of symmetry, body cavities, and sensory capabilities.
