what is another name for the visible surface of the sun?
biosphere
lithosphere
chromosphere
photosphere

What must be done to breed dogs for a partical trait

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)