<meta http-equiv="refresh" content="1; url=/nojavascript/"> Human Actions and the Sixth Mass Extinction ( Video ) | Biology | CK-12 Foundation
Dismiss
Skip Navigation

Human Actions and the Sixth Mass Extinction

%
Best Score
Practice Human Actions and the Sixth Mass Extinction
Practice
Best Score
%
Practice Now

Disappearing Frogs

Disappearing Frogs

Around the world, frogs are declining at an alarming rate. Frogs bridge the gap between water and land habitats, making them the first indicators of ecosystem changes. Meet the Bay Area researchers working to protect frogs across the state and across the world.

Reviews

Email Verified
Well done! You've successfully verified the email address .
OK
Please wait...
Please wait...

Original text