[asking]

Question:The earliest forms of life on earth are found in rocks.

Possible Answers:

a) 4.6 billion years old.

b) 3.5 billion years old.

c) 1 billion years old.

d) 4 million years old.

e) 1 million years old.

b) 3.5 billion years

[asking]

D
Oxygen was not present in the early atmosphere b ecause oxygen is a waste product produced by photosynthesizing organisms such as plants and cyanobacteria, which did not exist then.

[FlyYakker]

Or ask the teacher, she/he probably would be pleased to answer. But, reading the book would be a good thing and good practice for the next test.

As you go through adult life, you won't always have a "help desk" available and it is good to learn now how to find things the hard way and determine the best answers on your own.

[pramod awasthi]

Hey dear u know only one reason for done that thing that temprature decreases so high temp adopted living being get died hehehhe
pramod