For Many Years Scientists Believed That Almost All Animal Lineages

question 17

Multiple Choice

For many years scientists believed that almost all animal lineages burst into being during the Cambrian era (just after the end of the Precambrian super eon) .However,there have been many recent findings of animal-like fossils and "trace fossils" (fossils of an animal-like organisms movement) from the late Precambrian.Which of the following best explains why it took so long to realize there was animal-like life in the Precambrian?

• A)There were no animals in the Precambrian.
• B)Animals from the late Precambrian had soft bodies.
• C)There were many hard-shelled animals in the Cambrian.
• D)The global climate was such that there was poor fossilization in the Precambrian.
• E)There were very few animals during this period.

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Ticket Prices

The cost assigned for admission to an event, such as a movie, concert, or sports event.

Perfectly Inelastic

A market situation where the quantity demanded or supplied is completely unresponsive to changes in price.

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Empty Seats

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