Tripoblastic - Protosomes - Ecdysozoa - Tardigrada, Nematoda and Oncyhophora

Question 1

‘Nematoda’

Answer 1

thread - round worms

Question 2

Are nematoda segmented?

Answer 2

No. Unsegmented worms

Question 3

Nematoda body cell is called?

Answer 3

Pseudocoel

Question 4

How many layers of collagen are nematoda bodies covered in?

Answer 4

9

Question 5

How many lips does a nemdatoda mouth have?

Answer 5

3, leads to cuticle-lined larynx

Question 6

What acts as a pump in nematoda as they have no stomach?

Answer 6

Pharynx

Question 7

How far can Ascaris faeces be expelled?

Answer 7

up to 60 cm

Question 8

What is the pharungeal nerve ring or a nematoda made up of?

Answer 8

4 ganglia and 6 longitudinal nerves

Question 9

How can the structure of a nematoda be described in simple terms?

Answer 9

Tubes within a tube

Question 10

‘Tardigrada’

Answer 10

Slow walker

Question 11

Where can tardigrada be found?

Answer 11

Almost everywhere damp

Question 12

Do tardigrada have legs?

Answer 12

Yes, 4 pairs of fleshy legs with claws

Question 13

‘Onychophora’

Answer 13

Claw bearers (velvet worms)

Question 14

Describe an onychophora body

Answer 14

Worm like

Question 15

What does the hydrostatic skeleton of onychophora allow?

Answer 15

Enables muscles to act against each other so body and legs move

Question 16

Like insects, what delivers oxygen to tissues?

Answer 16

a system of air filled tubes opening to outside via spiracles

Question 17

How far can oncychophora squirt slime to attack prey?

Answer 17

4cm of stretchy and sticky slime