One evolutionary trend is that as you move from simpler animals to more complex animals,
systems become more specialized
systems become less specialized
organs become less specialized
cells become less speacialized

Question

One evolutionary trend is that as you move from simpler animals to more complex animals,
systems become more specialized
systems become less specialized
organs become less specialized
cells become less speacialized

mnbvcxz · Answer

I also have other questions

cas_fangirl_14 · Answer

I think A but I'm not sure.

nincompoop · Answer

This is a tautology 
One evolutionary trend is that as you move from simpler animals to $\sf \huge MORE$ complex animals

daniel.ohearn1 · Answer

A looks to be a good guess.  Consider bacteria then look at humans and their anatomy.

nincompoop · Answer

this is not a guessing question

kky10997 · Answer

A,  take a example of bactria and human. human have different type of cell that have perticular activity so cell is more speacialized. same for organism and system 
for particular work  we have particular system but bacteria dont so system of complex animals are more speacialized so A is correct

nincompoop · Answer

none of your responses make any sense in light of evolutionary trend