Please help me 20 points !!the answers choices are a- insertion
b-deletion
c- both insertion and deletion
d-impossible to determine

C.an insertion or a deletion

Explanation:

trust

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

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in