Why are index minerals helpful in determining the composition of metamorphic rock? A. they can be dissected and labeled B. index minerals only form at specific temperatures and pressures C. index minerals are not helpful in determining composition D. they are only found on the surface of the earth​

Describe at least 2 abiotic and two biotic factors found in the desert biome how do these abiotic factors interact with the biotic factors

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases