Question

Which animal has pseudocoelom?
A. Dragonfly
B. Wuchereria bancrofti
C. Drosophila melanogaster
D. Lepisma

Answer 1

The pseudocoelom is between the mesoderm and the endoderm layers, while the coelom is inside the mesoderm. It is also a vacuum filled with blood, and it covers the internal organs. The blastocoel gives rise to the pseudocoelom during embryonic development.

Complete answer: There is a body cavity known as a coelom that runs down centrally across the organism in higher organisms including vertebrates. The coelom, which is completely surrounded by mesodermal tissue, is between the body wall and the intestinal canal. It cannot be compartmentalised, unlike animals with a coelom, and it does not have peritoneal tissue demarcating it. To have a true coelom, there is a distinct gain. It allows for a more rigid structure due to the hydrostatic properties of the fluid being filled with fluid, making the skeletal system much more functional. It also helps with the elimination of waste, ventilation, improved digestion, internal organ shock absorption, and can be compartmentalised.
Now in order to get the correct answer take a look at all the options,
Dragonfly: Pseudocoelom is found in animals belonging to phylum Nematoda or Aschelminthes. Dragonfly does not come from phylum Aschelminthes. Hence, option A cannot be the correct answer.
Wuchereria bancrofti : Pseudocoelom is found in animals belonging to phylum Nematoda or Aschelminthes. Wuchereria bancrofti comes from phylum Aschelminthes. Hence, option B is the correct answer.
Drosophila melanogaster : Pseudocoelom is found in animals belonging to the phylum Nematoda or Aschelminthes. Drosophila melanogaster does not come from phylum Aschelminthes. Hence, option C cannot be the correct answer.
Lepisma : Pseudocoelom is found in animals belonging to phylum Nematoda or Aschelminthes. Lepisma: does not come from phylum Aschelminthes. Hence, option Dis cannot be the correct answer.

Hence, the correct answer is option B-Wuchereria bancrofti.

Note: Human beings are called coelomates as they have coelom present. During growth, the cavity is split into separate parts of the body. The blastopore grows into the anus like deuterostomes, while it progresses into the mouth in protostomes.