When examining the fossil record, a large environmental change, like an asteroid hitting the earth and wiping out a number of species, followed by adaptive radiation, would best be described by what kind of model?
a: habitat preference
b: punctuated equilibrium
c: temporal isolation
d: allopolyploidy
e: gradual speciation

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.

Need , i need a scenario of: artificial selectionmutationnon random mating

Atree root breaking a rock into smaller fragments is an example of both and mechanical weathering. when rocks are exposed to heat, they which can contribute to thermal stress. when harmful gases, such as sulfur dioxide and nitrogen oxide, react with water in the atmosphere, they can produce the agent of erosion involved in stream erosion is when the ground is so saturated that it can't absorb rainfall or when rain falls so quickly that the ground can't absorb the water, forms. a/an is a huge, heavy, moving body of ice that picks up rocks and sand and erodes the ground beneath it as these materials scrape across it. hot arid climates are prone to erosion by rows of trees and shrubs planted to protect fields from wind erosion are known as