When did plants first appear on earth? How do we know this?
The first land plants were believed to have become established between 500 and 425 million years ago during
the Ordovician period. This is also the period of time when invertebrates, such as arthropods and worms,
appeared on land. These first terrestrial invertebrates fed on decaying plant material.
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In an exchange of information between two people, the person to whom the communication is sent is called the:?
A) sender. B) receiver. C) interpreter. D) messenger.
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Which of the following is an example of a specific laboratory company that transmits electronic data to SpringCharts?
A. Quest B. LabCorp C. Spectrum D. All of these
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