CLASS 5 · LEARNING KNOWLEDGE
Fish and Life in Water – Basic Principles
How it works
Fish are cold-blooded vertebrates adapted to life in water. They usually breathe with gills, have fins for movement, and often scales as body protection. Their body structure is adapted to swimming in water. Many fish lay eggs, and in many species the offspring develop in water; however, there are also exceptions such as live-bearing fish. Aquatic organisms must adapt to different conditions such as oxygen content, temperature, and current.
Note
Fish can be identified by their gills, fins, and adaptation to life in water. They differ in body structure and way of life from other vertebrates because they are specially adapted to water.
Fish can be identified by their gills, fins, and adaptation to life in water. They differ in body structure and way of life from other vertebrates because they are specially adapted to water.
An example
Which characteristic is typical for fish, but not for mammals?
Fish have gills for breathing, whereas mammals have lungs. Gills are a typical characteristic of fish.
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50 Exercises
To the learning unit →Own explanation and own practice exercises by AmyMath. Subject reference framework: Biology. The topic assignment may vary by federal state.