Describes the most likely order of events in speciation | Homework Helpers

1. Which of the following describes the most likely order of events in speciation?
a.) genetic isolation, genetic drift and/or natural selection,divergence into two species
b.) genetic isolation, divergence into two species, geneticdrift and/or natural selection
c.) divergence into two species, genetic drift and/or naturalselection, genetic isolation
d.) genetic drift and/or natural selection, divergence intotwo species, genetic isolation

2. A species has six pairs of chromosomes. How many moleculesof DNA do the nuclei have during G2 phase?
a.) 6
b.) 12
c.) 24
d.) 48

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3. How does a scientific theory differ from a scientifichypothesis?
a.) there is no difference, the terms areinterchangeable
b.) a theory is a well-tested explanation for more generalphenomena, while hypotheses treat more specific observations
c.) theories define scientific laws, hypotheses are used toset up experiments
d.) theories are not necessarily testable, hypotheses aretestable.

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