In this type of selection, one end of the bell curve has a higher level of fitness than the middle or other end

In this type of selection, the middle has the highest level of fitness

in this type of selection, the middle is the least fit. The 2 ends have a higher level of fitness

the average acorn circumference is 3cm. There are very few acorns that are 2cm or 4cm. This is which type of selection?

In a population of birds, there are small, medium, and large beaks. A drought occured, killing off all the food sources for medium and large beaks. What type of selection will occur?

In a population of birds, there are small, medium, and large beaks. A drought occured, killing off all the food sources for only medium sized beaks. What type of selection will occur?

A factor that is necessary for the formation of new species is

2 populations of birds have different mating songs. This is an example of

when 2 populations reproduce at different times of the year, this is called

when 2 populations have different mating or courtship behaviors, this is called

one population of beetles mates during the day. Another prefers to mate at night. This is an example of

when 2 populations are separated by geographic barriers, this is called

2 populations of chipmunks can't mate due to a large mountain range keeping them apart. This is called

Mass extinction would most likely result from which of the following events?

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