NEET BIOLOGY

Detailed explanation-1: -Precambrian time covers the vast bulk of the Earth’s history, starting with the planet’s creation about 4.5 billion years ago and ending with the emergence of complex, multicelled life-forms almost four billion years later.

Detailed explanation-2: -The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth’s history, set before the current Phanerozoic Eon.

Detailed explanation-3: -Precambrian Resources The Precambrian is divided into three eons highlighted below, from youngest to oldest: Hadean, Archean, and Proterozoic.

Detailed explanation-4: -Pre·cam·bri·an (ˌ)prē-ˈkam-brē-ən-ˈkām-: of, relating to, or being the earliest era of geologic history or the corresponding system of rocks that is characterized especially by the appearance of single-celled organisms and is equivalent to the Archean and Proterozoic eons see Geologic Time Table.