Animal Kingdom

Question 1

From which geological period does the earliest fossil evidence for deuterostomes come?

Answer 1

Cambrian

Question 2

What is the order of geological periods

Answer 2

Precambrian
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian
Triassic
Jurassic
Cretaceous
Tertiary
Quarternary

Question 3

How does a deuterostome coelom develop?

Answer 3

Mesodermal pockets bud off from the cavity of the gastrula

Question 4

Early deuterostomes were bilaterally symmetrical, segmented animals with a pharynx that had ………..

Answer 4

Pharyngeal slits

Question 5

3 main body regions of hemichordates

Answer 5

Proboscis
Collar
Trunk

Question 6

What are the two main groups of hemichordates?

Answer 6

Acorn worms

Pterobranchia

Question 7

What are the chordate sub-phyla?

Answer 7

Vertebrates
Cephalochordates
Urochordates

Question 8

Chordate morphological features during development:

Answer 8

Dorsal hollow nerve cord
Muscular tail extending beyond anus
Notochord - dorsal supporting rod
Pharyngeal slits

Question 9

What is the atrium in non-vertebrate chordates?

Answer 9

A large space enclosed by a tunic-like covering

Question 10

What is an endostyle?

Answer 10

Secretes mucus to trap food particles

Question 11

What morphological features do vertebrates share?

Answer 11

Anterior skull - large brain
Vertebral column
Organs suspended in a coelom
Ventral heart