Akangaroo is a mammal. what does a kangaroo lack that mammals such as dogs and cats have? a) amniote eggs b) pouch c) notochord d)placenta

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explanation:

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the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.