Select the correct statement about the evolution of animals.

a. no animal fossils are found in strata formed before the cambrian explosion.
b. the oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.
c. approximately half the phyla of living organisms are found in cambrian sediments.

The correct answer is b. The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.

Explanation:

The oldest one of them all is the hematite tubes, that are dated about 3.77 billion to 4.2 billion years and it's from a yet unknown bacteria.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.