Answer:
Early land animals had both lungs AND gills, and their bodies consisted of few hard parts. Meaning they lacked things like an exoskeleton for instance. Animals today have either lungs OR gills and many have protecting hard parts of their bodies.
Explanation:
Answer:
Light dependent reaction and the Calvin cycle
Explanation:
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"REPRODUCTIVE ISOLATION" needs to occur for speciation to happen.....
Answer:
Ocean Thermal Energy Conversion (OTEC)
Explanation: