Chapter 7: Speciation and hybridization ... clock against a well-documented pattern of geological change as well as phylogenetic trees. Fig. 4. Map of the Hawaiian islands, showing the age-graded ...

Even for serious bird-watchers, Black-capped Chickadees and Carolina Chickadees are tough to tell apart. Both are members of ...

Meiosis Concept Inventory Concept inventory that tests student misconceptions on meiosis. Contains 17 questions that test 5-6 independent concepts. Developed in the context of large introductory ...

The biological equivalent is "allopatric speciation," an evolutionary process in which one species divides into two because the original homogenous population has become separated and both groups ...

Laws on food safety, biosecurity and conservation all rely on identifying species, meaning this concept still has an important role to play. The definition of speciation is that it is the process by ...

The concept of punctuated equilibrium was ... t endure because of so much interbreeding among like creatures. Rather, speciation is more likely at the edge of a population, where a small group ...

As long as the individuals in a population have the opportunity to interbreed and combine genes, they remain one species. A population of one species can only evolve into more than one species if ...

This book clarifies how adaptive processes, rather than geographic isolation, can cause speciation. Adaptive speciation occurs when biological interactions induce disruptive selection and the ...

Deep inside what we perceive as solid matter, the landscape is anything but stationary. The interior of the building blocks of the atom's nucleus -- particles called hadrons that most of us would ...

During a five-year mapping voyage along South America's coastline ... In the mid-1800s, this was a revolutionary concept: ...