The fossil record shows a sequence from simple bacteria to more complicated organisms through time, it is very reliable because it is physical evidence and by studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth.
A large class of molecules is called a macromolecule.
Answer:
I think it can be best described as sets
Answer:
the correct answer is snakes and lizards
Answer:
I believe intestine.
Explanation:
since tapeworms resides in intestine
