1. Can macroevolution occur without microevolution? Explain in detail and give an example 2. Some fish are considered separate species even though they can produce hybrids when mated. Could these fish be considered separate species as defined by the biological species concept? Explain in detail and give an example 3. How might reproductive isolation lead to even stronger reproductive isolation? Create a fictitious example using some of the isolating mechanisms mentioned in this module. 4. Why is physical isolation of a population usually required for speciation (macroevolution) to occur? What are some exceptions to this?