When the continents separated, organisms were forced to be placed in different locations with different environmental conditions. In order to survive in their new environment, over time, various flora and fauna developed various body mechanisms to cope up. This brought up the speciation of flora and fauna.
<span>This phylum exists exclusively in the sea, and cannot be found on land or in fresh water.
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Answer:b
Explanation: b is correct
Adaptive radiation
occur(s) when a species gives rise to many new species after colonizing a region with diverse habitats.
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