Based on fossil evidence, about how long ago did the first single-celled life form appear on Earth? 130 million years ago
1.5 billion years ago
2.5 billion years ago
4.1 billion years ago

Vbfdgrtrt6 vcvbnmyhj7y7777

Which summarizes the relationship between density of an element and its distribution in earth? a. the greater an element’s density, the greater the amount of it found in the crust. b. the denser an elements is, the smaller the amount of it earth core. c. the greater an elements density, the smaller the amount of it’s found in the crust

What is the primary purpose of a game reserve?