Old School Vertebrates

Question 1

deuterostomes

Answer 1

chordates hemichordates and echinoderms

Question 2

What distinguished deuterostomes

Answer 2

blastopore from embryo form anus

Question 3

homologous

Answer 3

2 structures derived from same tissue during development

Question 4

vertebrates

Answer 4

mammals birds and coelacanth

Question 5

metameric segmentation

Answer 5

identical segments

Question 6

hox genes

Answer 6

segment identity

Question 7

paedomorphosis

Answer 7

bilateral larval forms give rise to primitive filter feeding vertebrates

Question 8

lancelets

Answer 8

fish like chordates

Question 9

agnathans

Answer 9

jawless

hagfish and lampreys

Question 10

ostracoderm

Answer 10

armoured jawless fish

Question 11

jaws were acquired from

Answer 11

gills slits

Question 12

gnathostomata

Answer 12

jawed fish

Question 13

chondricthyes

Answer 13

sharks

Question 14

ostereichthyes

Answer 14

teleost and tetrapods

Question 15

actinopterygii

Answer 15

ray finned fish

Question 16

sarcopterygii

Answer 16

lobe finned fish

Question 17

evolution of lobes to limbs required

Answer 17

structural changes because animal not supported out of water

Question 18

anapsid

Answer 18

no hole - turtles

Question 19

synapsid

Answer 19

mammals - I hole

Question 20

diapsid

Answer 20

2 holes - reptiles birds snakes

Question 21

amniotes

Answer 21

reptile birds mammals

posses amnion

Question 22

What enabled birds to occupy all continents

Answer 22

flight and endothermy

Question 23

synapsids have rise to

Answer 23

therapsids

Question 24

arthropod

Answer 24

vertebrate with exoskeleton, joint appendages and segmented body