Phylum Nematoda

Question 1

are triploblastic and pos-sess an embryonic mesoderm that is sandwiched between the ectoderm and endoderm. They are also bilaterally symmetrical, meaning that a longitudinal section will divide them into right and left sides that are symmetrical.

Answer 1

Phylum Nematoda

Question 2

These animals show the presence of ___ , which is a flexible but tough exoskeleton that offers protection from the external environment. It is rich in collagen and a carbohydrate-protein polymer called chitin, and forms an external “skeleton” outside the epidermis.

Answer 2

cuticle

Question 3

The name Nematoda is derived from the Greek word ___ which means “thread” and includes roundworms

Answer 3

Nemos

Question 4

The overall morphology of these worms is ____

Answer 4

cylindrical

Question 5

Nematodes employ a variety of reproductive strategies that range from monoecious to dioecious to ____,

Answer 5

parthenogenic

Question 6

it is a large intestinal roundworm, steals nutrition from its human host and may create physical blockage of the intestines.

Answer 6

Ascaris

Question 7

a blood-infective parasite, is the notorious dog heartworm species

Answer 7

Dirofilaria immitis

Question 8

It infects the lymph nodes of humans, resulting in the non-lethal but deforming condition called elephantiasis, in which parts of the body become swelled to gigantic proportions due to obstruction of lymphatic drainage and inflammation of lymphatic tissues.

Answer 8

Wuchereria bancrofti