Ronaldoedp445idn
Answered

IDNLearn.com makes it easy to find accurate answers to your questions. Our community provides accurate and timely answers to help you understand and solve any issue.

Study this geologic time scale.

| ERA | PERIOD | MILLIONS OF YEARS AGO | KEY EVENTS |
|-----------|--------------|-----------------------|-----------------------------|
| Cenozoic | Quaternary | | Humans evolve |
| | Tertiary | | Extinction of dinosaurs |
| Mesozoic | Cretaceous | | |
| | Jurassic | | |
| | Triassic | | |
| Paleozoic | Permian | | Permian mass extinction |
| | Carboniferous| 330 | Invertebrates become common |
| | Devonian | | |
| | Silurian | | |
| | Ordovician | | |
| | Cambrian | | |
| Proterozoic| Precambrian | | Earliest life |
| Archean | | 3500 | |
| Hadean | | | |

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 :

GinnyAnsweridn
To determine when invertebrates became common on Earth, we need to refer to the geologic time scale in the given table. According to the table, this event is marked in the Paleozoic era. This era includes several periods listed as follows:
- Permian
- Carboniferous
- Devonian
- Silurian
- Ordovician
- Cambrian

Among these periods, the Devonian period, which occurred approximately 410 million years ago, stands out as the period when invertebrates became common.

Hence, the correct answer is:
410 million years ago.
Thank you for participating in our discussion. We value every contribution. Keep sharing knowledge and helping others find the answers they need. Let's create a dynamic and informative learning environment together. Thank you for trusting IDNLearn.com with your questions. Visit us again for clear, concise, and accurate answers.