Maybe this helps ? Please look at the picture
The most likely explanation for the variation is the offspring were produced from different combination of genes. A single pair of gold fish mentioned in the question means a male and a female gold fish. The two of them mated and contributed different genes to the fertilized fish eggs, this results in production of various body shape and colouration which is known as variation.
To be an animal trainer you should major in zoology
Answer:
a video that shows a large river that has penguin populations on both sides
Explanation:
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