You find a new species of worm and want to classify it. which of the following lines of evidence would allow you to classify the worm as a nematode and not an annelid?
a) it undergoes protostome development.
b) it is segmented.
c) it is triploblastic.
d) it has a coelom.
e) it sheds its external skeleton to grow.

The correct answer is: E) It sheds its external skeleton to grow.

Nematoda and Annelida re both types of worms but with huge difference in their body structure: at Nematoda has a cylindrical body with tapered ends (roundworms) that is covered with tough cuticle while Annelida has a cylindrical segmented body (segmented worms). Another difference is that Nematoda has a pseudocoelom while Annelida has a true coelom.  Nematodes are usually parasites of plants or animals while most annelids are free-living organisms that live in the soil.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

a

explanation: