A clade is a group of organisms with a shared ancestor.
What is clade?
- "A group of organisms believed to comprise all the evolutionary descendants of a common ancestor."
- Evolution means the change in characteristics/ traits over many generation. It is based on natural selection.
- Natural selection means that the organisms who is fit enough to survive and adapt in the given conditions produces many offspring. It means survival of the fittest.
What do you mean by shared ancestor?
- "An ancestor that two or more descendants have in common."
- These leads to homologous evolution.
- Homologous evolution means that the structural origin is common but have difference in their functions.
- Example: forelimb of human, whale and bats have somewhat same anatomical structure but they perform different functions.
Hence, the correct option is: C. A group of organisms with a shared ancestor.
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