The atmosphere and seas of the early earth lacked oxygen. what kind of organisms could not have lived under those conditions?

Which two structures contain DNA

1. What are two advantages of two disadvantages of hydropower?

Natural selection argue claim evidence reasoning answer

What polysaccharide do the rabbit's cells build?

Darwins concept of evolution was not influenced by

Quinn is a six-month-old baby girl who was born preterm. she now weighs 13 pounds. click on the link below to access a growth chart for infant girls.

What is the main cause of human-created mass extinction?

Earth rotates around the sun. true false

When scientists first started mapping human genes, they estimated that there were about 2 million genes. By the late 1990s, it was thought that there were only 100,000 genes, and then that number shrank to 19,000 in 2001.

Which statement best describes how light travels? Light, in a vacuum, travels at the same speed even if the light source is moving. Light given off from a moving source will travel faster in a vacuum.