What is the name of the star that is the closest to earth?

betelgeuse
antares
the sun
the moon

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur