In Charles Darwin's Day, the Fossil Record Began Abruptly with the Appearance

question 11

Essay

In Charles Darwin's day, the fossil record began abruptly with the appearance of shelled organisms. Today, we consider the same period-the Cambrian-as an "explosion" of life forms. Why has this perspective changed?

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Definitions:

Annual scholarships

Financial awards given to students once a year to support their education, often based on merit, need, or specific criteria set by the scholarship provider.

Semi-annual dividend

A payment made to shareholders from a company's earnings, distributed twice a year.

Perpetual preferred share

A type of preferred stock that has no fixed maturity date, often providing dividends indefinitely.

Compounded semi-annually

The method of computing interest by taking into account both the original amount of money deposited or lent and the interest that has been earned on that amount from past periods, with the calculation occurring semi-annually.