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To me they both seem like the process where a species is divided and evolves within their own niche to become a separate species from their ancestral species.

A. adaptive radiation
B. mutation
C. population genetics
D. genetic equilibrium

Similar selection pressures lead to similar features the evolve in related species (7)
Reproductive isolating mechanism that occurs before fertilization (10)
Speciation that occurs abruptly (13)
Small population rapidly diverges to occupy new niches in adaptive radiation (13)

1.
a) an area has a high number of species that exploit most of the available ecological opportunities.
b) an organism has a very stable set of features and capabilities over long spans of evolutionary time.
c) an organism colonizes an isolated area that is habitable but relatively devoid of life.
d) an organism colonizes an area that already has a high level of existing species diversity.
2. Which of the following statements regarding the definition of species is FALSE?
a) Taxonomy is the branch of biology concerned with naming and classifying the diverse forms of life.
b) The ecological species concept identifies species in terms of their ecological niches.
c) The phylogenetic species concept defines a species as a set of organisms with a unique genetic history.
d) The morphological species concept relies upon comparing the DNA sequences of organisms.
Need help, thanks!

A. Random changes occur in the genes or chromosomes of an orgnism.
B. Organisms move from one location to another without returning.
C. Organisms are separated from members of their species by rivers or mountains.
D. A species changes to fill many niches in an area.