Question

Question 13

13On a journey to the intertidal zone, you find a eucoelomate with eight hardened dorsal plates and an open circulatory system. Which group would you place it in?

Group of answer choices

1-polyplacophora

2-annelida

3-gastropoda

4-ecdysozoa

Question 14

14-Which of the following characteristics are present in mammalia and asteroidea but not in urochordata?

Group of answer choices

1-hair

2-ossified (bony) internal structure

3-hollow dorsal nerve chord

4-hydrostatic skeleton

Answer 1

Q13

Answer: 1-Polyplacophora

Eight Hardened Dorsal plates are a characteristic feature of polyplacophorans. Although Organisms belonging to Gastropoda and Ecdysozoa have an open circulatory system, the presence of hardened dorsal plates is non-existent. Annelida is excluded from consideration since it doesn't include animals with an open circulatory system.

Q14

Answer:2-Ossified( bony )internal structure

Presence of hair is an exclusive characteristic of mammals and a hydrostatic skeleton is a distinctive feature of steroids not of Mammalia. A hollow dorsal nerve cord is not present in Mammalia and Asteroidea but is present in Urochordata.