No. They are symmetrical and bell-shaped.

I don't think there is a bell shaped chest. There is a barrel shaped chest. It usually means you have emphysema.

The "cloche" was a popular bell-shaped hat in the 1920's. Cloche is also French for bell

Angel's Trumpet is one of the plants with drooping white bell shaped flowers. Lily of the Valley is another plant with white drooping bell shaped flowers.

True

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No. The Student's t-distribution, for example, is also bell shaped.