EARTH SCIENCE
GEOBIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Ordovician and Silurian
|
|
|
Cambrian and Ordovician
|
|
|
Permian and Cretaceous
|
|
|
Cambrian and Devonian
|
Detailed explanation-1: -The Paleozoic began with the Cambrian Period, 53 million years best known for ushering in an explosion of life on Earth. This “Cambrian explosion” included the evolution of arthropods (ancestors of today’s insects and crustaceans) and chordates (animals with rudimentary spinal cords).
Detailed explanation-2: -The Paleozoic Era begins with the Cambrian Period (541 million years ago) and ends with the Permian Period (252 million years ago).
Detailed explanation-3: -Cambrian Period (542–488 Million Years Ago) The first period in the Paleozoic Era is known as the Cambrian Period. Many of the ancestors of the species that have evolved into what we know today first came into existence during the Cambrian Explosion in the early millennia of this period.