More cards in this set

Card 16

Front

ordovician graptolites name (Did)

Back

Preview of the front of card 16

Card 17

Front

Ordovician first graptolite

Back

Preview of the front of card 17

Card 18

Front

thecae are growing vertically upwards from the sicula

Back

Preview of the front of card 18

Card 19

Front

thecae are added downwards from the sicula

Back

Preview of the front of card 19

Card 20

Front

thecae are added on one side of the stipe

Back

Preview of the front of card 20

Card 21

Front

thecae are added on two sides of the stipe

Back

Preview of the front of card 21

Card 22

Front

thecae became more .......... through evolutionary time

Back

Preview of the front of card 22

Card 23

Front

how did they feed?

Back

Preview of the front of card 23