How has pliable whale bone been used over the centuries?

Many of the baleen eyeglass frames seen in advanced collections probably date from the late 17th to the very early 19th century. ... Whalebone is easy to carve and shape since it has a pliable almost plastic-like property. As such it was used in various manufacturing industries as a forerunner of plastic.

Explanation:

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d we did this already

you know they are heterozygous for a trait because they have it as jj or jj.