Advertisement Upgrade to remove ads


woody vines common in tropical rain forests


a support or prop


a group of organisms so similar to one another that they can breed and produce fertile offspring


dense covering formed by the leafy tops of tall rain forest trees


plants such as mosses, lichens, and orchids, that grow on other plants but do not take nutrients from them


large long-armed ape of Borneo and Sumatra having arboreal habits

carbon dioxide

a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances


odorless gas that is 21 percent of our atmosphere, and is necessary for life

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording