Answer:
A.
Explanation:
I've had to answer this before
In my opinion mixed layers would be the best choice
I don’t know any famous ecologists but I know their knowledge impacts us today because we wouldn’t know that much about how and why life forms interact with their habitats
A circle is to round as an oval is to elliptical/egglike.
I recall that Professor Kwang had observed amoebas that had cannibalized bacteria cells. The bacteria were slaughtering the amoebas, but somehow some survived. This particular group of amoebas contained bacteria that thrived inside it. Hence the name, endosymbiosis. However, this lucky group and it's offspring could not survive without bacteria.
