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Sound waves of frequency 300 Hz have a speed relative to sound waves in the same medium of frequency 600 Hz that is
Extinct Organisms
Species that no longer exist, having disappeared from their natural habitats and are no longer part of Earth's biodiversity.
Fossil Record
The history of life on Earth as represented by fossils, the preserved remains or traces of organisms.
Behavior
The actions or reactions of an organism, often in response to its environment, which can be innate or learned.
Turtles
Reptiles with a bony or cartilaginous shell developed from their ribs that acts as a shield.
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