Answered

Discover the answers to your questions at Westonci.ca, where experts share their knowledge and insights with you. Discover in-depth solutions to your questions from a wide range of experts on our user-friendly Q&A platform. Join our platform to connect with experts ready to provide precise answers to your questions in different areas.

Study this image of a geologic time scale.

\begin{tabular}{|c|c|c|c|}
\hline ERA & PERIOD & \begin{tabular}{l}
MILLIONS OF \\
YEARS AGO
\end{tabular} & KEY EVENTS \\
\hline \multirow{2}{}{ Cenozoic } & Quaternary & & \multirow{2}{}{\begin{tabular}{l}
Humans evolve \\
Extinction of \\
Dinosaurs
\end{tabular}} \\
\hline & Tertiary & & \\
\hline \multirow{2}{}{ Mesozoic } & Cretaceous & 138 & \\
\hline & Jurassic & & \\
\hline \multirow{6}{}{ Paleozoic } & Permian & 240 & \multirow{6}{}{\begin{tabular}{l}
Permian mass \\
extinction \\
Invertebrates \\
become common
\end{tabular}} \\
\hline & Carboniferous & 330 & \\
\hline & Devonian & 410 & \\
\hline & Silurian & & \\
\hline & Ordovician & & \\
\hline & Cambrian & & \\
\hline \begin{tabular}{l}
Proterozoic \\
Archean
\end{tabular} & \multirow{2}{}{\begin{tabular}{l}
Also known \\
as \\
Precambrian
\end{tabular}} & 3500 & \\
\hline & Hadean & & \\
\hline
\end{tabular}

How long ago did invertebrates become common on Earth?

A. 1.6 million years ago
B. 132 million years ago
C. 410 million years ago
D. 520 million years ago

Sagot :

GinnyAnswer
To determine when invertebrates became common on Earth, let's refer to the Paleozoic era on the geologic time scale.

In the Paleozoic era, there's a listing for the Devonian period with a note "Invertebrates become common" marked at "410 million years ago".

Based on this information:

- Era: Paleozoic
- Period: Devonian
- Years Ago: 410 million (when invertebrates became common)

Thus, the correct answer to the question "How long ago did invertebrates become common on Earth?" is:

410 million years ago.
Visit us again for up-to-date and reliable answers. We're always ready to assist you with your informational needs. We appreciate your time. Please revisit us for more reliable answers to any questions you may have. Find reliable answers at Westonci.ca. Visit us again for the latest updates and expert advice.