Question #1: What is the adult fate of notochord?

QUESTION 3 Which of the following is NOTa characteristic of all chordates? O Bilateral symmetry O Hollow nerve cord O Ability to live out of water O Presence of a notochord O Presence of a muscular tail

part i Animal phylogenies based on molecular and morphological characters can be different in regards to the placement of the phylum Platyhelminthes. What is the best explanation for this?choose 1 a. The Platyhelminthes clade separated from other clades before coeloms evolved and consequently Platyhelminthes have never had a coelom. b. Some Platyhelminthes have a coelom, but others do not and it is difficult to conclude anything about its evolution within the clade. c. Platyhelminthes originated from ancestors with a coelom and have retained it to the present time. d. Modern Platyhelminthes do not have a coelom but did originate from an ancestor that had one. e. Platyhelminthes evolved from an ancestor without a coelom but developed one during the course of their evolution.   part ii  If current molecular phylogenies of land plants are correct and to be believed they suggest that. Choose 1    a. the Zygnematales and land plants adapted to the same environmental…

Why gorillas are 1)euteleostomi 2) sarcopterygii 3) didnotetrapodomorpha And reason for the chosen names?