In humans, thick eyebrows are dominant to narrow and separated are dominant to joined. Michael has a very thick unibrow, and is worried his future children will as well. He is surprised he even has one, since his mother has narrow and separated eyebrows, just like his wife Alexia. Alexia's dad has a unibrow.

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

explanation:

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