Species a and species b share 80% of the same nucleotide sequences. species a and species c share 70%. is species a more closely related to species b or c? how do you know?

Suppose you are estimating the size of a blue crab population. what is the population size if the number marked in the first catch is 40, the total number in the second catch is 200, and the number marked in the second catch is 50?

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere