Which of the following provides the best example of selective breeding? a
Scientists have noted that different varieties of birds on different islands have beaks that are suited to the birds available foods
b
Racehorses that run fastest are the ones that are allowed to produce offspring, leading to faster racehorses
c
Leopard seals captured in Antarctica have thicker layers of blubber than harbor seals captured in the Pacific Ocean
d
Hummingbirds have a long, narrow beak that enables them to reach food in the deepest part of the flower

b

Explanation:

the fastest race horses were the only ones chosen to breed

B.)

Explanation:

Selective breeding is when humans choose selective traits for an organism such as speed.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.