D. <span>controlled
is the right answer because a</span><span>n </span>experiment<span> in which an observer tests a hypothesis by looking for changes carried by alterations to a variable.</span>
Biology is the study of natural science (nature) and it is important to humans cause we learn about it
If the egg was fertilized is alive, The kind of egg you get at the grocery store are not alive
I think it’s A... not sure! Because you have no A so maybe A
