What type of transport takes place when a proton allows an ion to enter a cell but no additional energy is needed to make this happen

What is the 77 element on the periodtic table

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

Which nucleotide component contains nitrogen