NEMATODA

Question 1

Characteristics of Ecdysozoans?

Answer 1

• Trilayered cuticle
• Cuticle molted for growth

Question 2

Are nematodes aceolomates, true ceolomates, pseudoceolomates or none?

Answer 2

pseudoceolomates

Question 3

Complete or incomplete digestive system?

Answer 3

Complete

Question 4

How do they support their body?

Answer 4

• Cuticle
• Muscles
• Hydrostatic skeleton of the blastocoel

Question 5

What type of muscles?

Answer 5

Only longitudinal
No circular

Question 6

How do they move?

Answer 6

S-shaped undulations

Question 7

What is the function of their pseudocoelom?

Answer 7

nutrient and gas exchange

Question 8

Function of Renette cells?

Answer 8

they connect directly to an excretory pore for osmoregulation and water removal

Question 9

How do they excrete nitrogenous waste?

Answer 9

Nitrogenous waste lost across intestine

Question 10

Gonochoristic or hermaphroditic?

Answer 10

most Gonochoristic

Question 11

Direct or indirect development?

Answer 11

Direct development

Question 12

Internal or external fertilization?

Answer 12

Internal

Question 13

What are some parasitic nematodes?

Answer 13

hookworms, whipworms

Question 14

Which is larger: males or females?

Answer 14

females larger than males