Many cycles on earth involve the conservation of matter. which of the following is not a major cycle on earth?
a. air cycle
b. rock cycle
c. carbon cycle
d. nitrogen cycle

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses

What enzyme is most important for dna replication and why?