plz help... 20 points!!
Answers
17.} Answer↓ brainliest plzz
The Cambrian Period: Following the Precambrian mass extinction, there was an explosion of new kinds of organisms in the Cambrian Period (544–505 million years ago). Many types of primitive animals called sponges evolved. Small ocean invertebrates called Trilobites became abundant.
During the Quaternary Period (1.8 million years ago–present), Earth’s climate cooled, leading to a series of ice ages. Sea levels fell because so much water was frozen in glaciers. This created land bridges between continents, allowing land animals to move to new areas. Some mammals, like the woolly mammoths adapted to the cold by evolving very large size and thick fur. Other animals moved closer to the equator or went extinct, along with many plants.
The last ice age ended about 12,000 years ago. By that time, our own species, Homo sapiens, had evolved. After that, we were witnesses to the unfolding of life’s story. Although we don’t know all the details of the recent past, it is far less of a mystery than the billions of years that preceded it
18.}
It must be an archelon (prehistoric sea turtle) fossil or a common snapping turtle living in marine life
Answer:
Following the Precambrian mass extinction, there was an explosion of new kinds of organisms in the Cambrian Period (544–505 million years ago). Many types of primitive animals called sponges evolved. Small ocean invertebrates called Trilobites became abundant.
During the Quaternary Period (1.8 million years ago–present), Earth’s climate cooled, leading to a series of ice ages. Sea levels fell because so much water was frozen in glaciers. This created land bridges between continents, allowing land animals to move to new areas. Some mammals, like the woolly mammoths adapted to the cold by evolving very large size and thick fur. Other animals moved closer to the equator or went extinct, along with many plants.
The last ice age ended about 12,000 years ago. By that time, our own species, Homo sapiens, had evolved. After that, we were witnesses to the unfolding of life’s story. Although we don’t know all the details of the recent past, it is far less of a mystery than the billions of years that preceded it
18.}
It must be an archelon (prehistoric sea turtle) fossil or a common snapping turtle living in marine life