Is the work of 'Hanley's Loop' related? 

Cotton fiber are made of

All green plants and certain blue-green algae which can produce food by photosynthesis are called the_____.

Name of the branch of Gynecology in which scientific study of animal behavior is done 

___ elements have the largest atoms.

The ozone layer absorbs

Study of birds is called? 

Which is the second most abundant element in the universe?