Monitoring levels of which two gases would help determine the human impact on air quality?
A. Methane
I B. Water vapor
I C. Carbon dioxide
✓ D. Oxygen

In which situations is the principle of cross-cutting relationship useful in determining relative age?

In 1992, hurricane andrew left a wake of destruction through florida. one victim of the storm was a reptile-breeding facility. over 900 burmese pythons were set free, and today thousands of pythons live in florida. these pythons are an invasive species, or a harmful species not native to the region. 1. what impacts do you think the burmese pythons might have on local ecosystems

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.