Photosynthesis is important to living organisms because it is

the foundation of most food chains.

the source of nitrogen gas in the air.

how animals get carbon dioxide to breathe.

the process that occurs in most ecosystems.

Biologists have classified the elephant shrew, a small mole-like mammal, with other shrews of similar size and body shape.

Scientists believe that the carbon levels in the atmosphere are growing, thus throwing off the stability of the Earth's atmospheric carbon. What are some reasons that more carbon is building up in the atmosphere, while less oxygen is being produced?

Consider a build-at-home bookshelf that comes with instructions and various pieces of wood as an analogy for translation. In this analogy, what would best match the job of the ribosome?

A girl's blood group is o. which group of people can donate blood to her?

To determine when a neutralization reaction has gone to completion during a titration, one can use a: a. pH meter b. barometer c. buret d. stirring rod

What is the correct nucleotide sequence for CTAGG

Define DNA replication.

The membrane lining the medullary cavity is the?

Scar tissue is made from what tissue

In human body temperature is kept fairly constant by automatic responses controlled by