Why is the Amazon rainforest called "the lungs of the planet"?

What are the four possible protein bases, or nucleotides?

One method for understanding the field of geography is a frame work of _ different _ A:five; continents B:four, fields C:five; themes D:four; elements

Which of the following is an example of the effects of global climate change A. Decreasing global sea level B. Melting polar ice caps C. Weather patterns remaining the same D. Increasing temperatures in Gulf Stream Apex

What is the most abundant element in the universe?

Phoenician Traders set up trading posts in all of the following regions except a North Africa B Spain C British Isles D Italy

Trees in deciduous forest do what? A. Shed leaves during one season B. Grow in a warm Mediterranean climate C. Have needlelike leaves D. Grow in a climate that is cold year round

How many miles long is the great wall of china

What landforms are created at convergent boundaries?

In which direction does the Sun appear to move across the sky? Ofrom west to east from east to west from north to south from south to north

What is a planetary nebula neither a planet nor a nebula?