Whales are thought to have evolved from land animals similar to large otters. as evidence of this, whales have useless leg bones (structure c. that float inside their bodies. these leg bones are structures.

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answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

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