A population of alpaca develop a mutation where many individuals have stumpy legs. This physical change keeps a portion of the population from interbreeding. Over many generations, two distrinct species appear, the short and long-legged alpaca.
What is this an example of?

a. Gene Flow
b. Sympatric Speciation
c. Artificial Selection
d. Allopatric Speciation
e. Gene Drift

You arrive late to a biological seminar. however, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. immediately, you know that they are talking about a: ]

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Which of the following typically characterizes a tropical rainforests