Speciation occurs during the evolutionary development, or phylogeny, of a species. in which of the following situations can speciation occur?

when a population becomes extinct.
when two populations are reproductively isolated.
when a population becomes interbred.
when two populations merge to become one population.

What heat is removed how does a gas become a liquid

Read the sentence. “yesterday we arrived late for the outdoor concert in the city gardens.” which words in the sentence are adverbs? a. late; city b. yesterday; outdoor c. yesterday; late d. outdoor; city

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.