Which of the following human activities reduces the level of ozone in the atmosphere?
a. Using artificial lighting in scientific polar stations
b. Using large banks of solar cells for energy production
c. Releasing chlorofluorocarbons from aerosol cans
d. Destroying large areas of the equatorial rain forests

How does the study of genetic disorders such as pku biologists understand normal alleles?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.