Nucleic acids are one of the four major macromolecules. the main functions of nucleic acids are to

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

This is a biological reaction due to a stimulus. i need this quickly !