What organ is found in mammals?

A) Lungs

B) Gills

C) both gills and lungs

D) Neither gills nor lungs

Which types of telescope use a mirror to bring light to focus?

Ozone is classified as a secondary pollutant. identify the primary pollutants necessary for its formation and describe how tropospheric ozone is formed.

Is a octopus a wet spider

Choose the statement that best describes the Americans who served in Vietnam. A. Most Americans who served in Vietnam had been drafted. B. Most US soldiers in Vietnam were in the infantry. C. Most US soldiers had attended a college or university. D.

Why did Copernicus not tell anyone about his theory until his deathbed?

Why do amoebas change shape?

Microscopic organisms with calcium carbonate shells are called.

Who is the president of Guatemala?

Is a technique that allows the DNA fragments to separate according to length

How do you think a single-celled organism developed into so many different forms of life?