Unlike Earth, Mars has lost their atmosphere over time, causing it to become harsh and uninhabitable. What has protected the Earth's atmosphere?

How do you date a sample of rock that you suspect as being one of the earliest on earth

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees

The biological classification of organisms is called taxonomy. based on your own investigation, discuss the importance of taxonomy in biological ?