Phylum Chordata

Question 1

Phylum Chordata is composed of animals with?

Answer 1

backbone

Question 2

Chordates are triploblastic animals, meaning they have a body derived from three embryonic cell layers:

Answer 2

ectoderm, mesoderm, and endoderm

Question 3

terrestrial vertebrates develop this and later turn into jaw and inner ear bones

Answer 3

Pharyngeal slits

Question 4

characteristics/parts present in chordates

Answer 4

notochord, dorsal hollow nerve cord, post-anal tail, ventral heart, hepatic portal system and RBC

Question 5

blood vascular system

Answer 5

closed circulatory system

Question 6

classes under Phylum Chordata

Answer 6

Agnatha, Chondrichthyes, Osteichthyes, Amphibia, Reptilia, Aves, Mammalia

Question 7

jawless fish

Answer 7

Class Agnatha

Question 8

hagfish

Answer 8

Order Myxiniformes

Question 9

lamprey

Answer 9

Order Petromyzontiformes

Question 10

cartilaginous fishes

Answer 10

Class Chondrichthyes

Question 11

sharks, rays and skates

Answer 11

Subclass Elasmobranchii

Question 12

frilled sharks: most primitive type of sharks

Answer 12

Order Hexanchiformes

Question 13

mackerel sharks, great white, megalodon, goblin shark, megamouth shark

Answer 13

Order Lamniformes

Question 14

chimaeras/ “complete heads”

Answer 14

Subclass Holocephali

Question 15

chimaeras

Answer 15

Order Chimaeriformes

Question 16

a cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals

Answer 16

notochord

Question 17

The heart of chordates are positioned in which region of the body?

Answer 17

ventral

Question 18

It is the posterior elongation of the body, extending beyond the anus. This is also a characteristic unique to chordates

Answer 18

post-anal tail

Question 19

a type of development in which an embryo develops into a mature individual without involving a larval stage

Answer 19

direct development