A fish breeder wishes to develop a silver goldfish. She starts with a diverse mixture of fish, some more silver than others. Generation after generation, she allows only the most silver fish to breed. After 30 years of work she has a new breed of fish with interesting traits, but on average, the fish are no more silvery than other goldfish. Which of the following would be a logical explanation for her failure?

There is no variation for the trait (silver coloration).
Silver coloration is an environmentally-determined trait.
The selection was artificial, not natural, so it did not produce evolutionary change.
There was no selection (differential reproductive success) related to silver coloration.
The breeder accidentally picked less silver fish when she meant to pick more silver fish.

emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

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

hi i’m going crazy about going tomorrow and i’ll tell you what i’m doing and i wanna is a way ya