Which of the following best describes passive immunity?
a) short-term protection
b) is passed from mother to baby
c) forms in another animal and is introduced into your body
d) all of the above

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

when it is at an intermediate population density

yes, because even though a theory has a  lot of evidence to support it, it is not always true