Asked by Rosandra Dominique on Jun 05, 2024
Verified
Which of the following chapters in geologic time occurred before there were abundant animals with hard parts?
A) Cenozoic
B) Mesozoic
C) Paleozoic
D) Precambrian
Abundant Animals
Refers to animal species that are common or have a large population in a particular area.
Precambrian
The earliest part of Earth's history, spanning from the formation of Earth up to the Cambrian Period, when most major groups of multicellular organisms started to appear.
Hard Parts
Refers to the durable, mineralized, or otherwise resistant parts of an organism, such as bones, shells, and teeth, often preserved as fossils.
- Understand the variety of life forms that have existed during various geological epochs.
Verified Answer
JM
Jordan MarderJun 09, 2024
Final Answer :
D
Explanation :
The Precambrian is the correct answer because it represents the vast span of time before the Cambrian period, which is when most major groups of animals with hard parts first appeared in the fossil record. This era encompasses the formation of the Earth about 4.6 billion years ago up until 541 million years ago, before the abundant appearance of complex life.
Learning Objectives
- Understand the variety of life forms that have existed during various geological epochs.