Answer:
Immune and Lymphatic Systems
Explanation:
The process called menstruation.
Check out this website http://science.jrank.org/pages/3421/Hummingbirds-Biology-hummingbirds.html
Answer:
yes. it's important to save the species that are closer to extinction first. the more critically endangered, the more important it is to save.
Explanation:
When an electron<span> moves from </span>one atom<span> to </span>another<span>, </span>both atoms become<span> ions.</span>
