What sub-atomic particle is counted to learn the atomic number of that element?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

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

Match the description of each organism to the appropriate category