The answer is 'C' because this is the only answer mentioning a hypothesis, and the whole point of the scientific method is to test a hypothesis.
Answer:
One distinguishing characteristicof all three clades i.e Deuterostomia, Lophototrochozoa, or Ecydysozoa are balstopore development, internal body cavity and exoskeleton respectively
Explanation:
Apart from molecular difference, there exist structural differences between the three clades, which are as follows –
Deuterostomia – The development of embryo is different from the protostomes as the first opening in this clade is anus and the blastopores develops into the anus.
Lophototrochozoa – They do not have ant distinguished internal body cavity. Organs with in coelom can move freely. For example - flatworm
Ecydysozoa – have the ability to shed their tough and flexible exoskeleton i.e cuticle , several times throughout their life span
Maybe detritivore and parasite. That's the best I can think of
"B", or Halter broken is the correct answer for this question.
I hope that I helped you! Good luck :)
