which among the folloing statements is correct? and why?
A.because chimpanzees are our sister group, we could interpret a phylogenetic tree as indicating that humans evolved from chimpanzees/.
B.no individual in any species ever would be expeted to behave in such a manner as to suffer a cost while benefiting another individuals.
adaptations are subjects to genetic constraints, fitness trade-offs, and historical constraints, so may be imperfect