common descent means the evolutionary in biology and how they have something linked with their common ancestors.
It’s c Xand Y good luck sweetie
I believe heterotrophs are organisms that get their energy by eating other organisms. These organisms are also called predators
Your answer is the peripheral proteins. Its on the inner or outer surface of the phospholipid bilayer, but not embedded in its hydrophobic core.
C) how energy moves from organism to organism
