Question

Select the common character found in largest and second largest phylum
1, all of them are triploblastic and exhibit internal fertilization only
2,body is divisible into head ,thorax and abdomen
3,all have chitinous/calcareous exoskeleton
4,mostly oviparous, coelomate, triploblastic animals with open circulation

Answer 1

Answer:

option 4 is the answer

4,mostly oviparous, coelomate, triploblastic animals with open circulation

Answer 2

The correct answer will be option d.

• The largest phylum is arthropoda and the second largest phyllum is mollusca.
• Both the phylums are oviparous which means they do not give birth to young ones directly instead they give birth by means of egg.
• they have coelom which is the body cavity.

• They have three germ layers i.e. endoderm ,ectoderm and mesoderm.
• The circulation is of open type i.e. blood does flow in blood vessels rather the organs are directly bathed into the blood stream.