Preview (15 questions)
1 Question
30 seconds
Q.


Coontail

Water poppies 

Moneywort

Blue Flag

2 Question
30 seconds
Q.


Lotus

Hydrocleys nymphoides

Waterthymes 

Elodea

3 Question
30 seconds
Q.


Salvinia

Coontail

Fanwort

Pondweed 

4 Question
30 seconds
Q.


Water hyacinth 

Water lettuce

Cattail

Egeria

5 Question
30 seconds
Q.


Elodea

Amazon frogbit

Nelumbo lutea 

Corkscrew rush

6 Question
30 seconds
Q.


Mosaic Flower 

Myriophyllum spicatum

Japanese water iris

Pondweed

7 Question
30 seconds
Q.


Elodea

Salvinia

Moneywort

Cattail 

8 Question
30 seconds
Q.


Duckweed

Vallisneria americana 

Water poppies

Blue Flag

9 Question
30 seconds
Q.


Water lettuce

Nelumbo lutea

Water chestnut 

Egeria

10 Question
30 seconds
Q.


Corkscrew rush 

Cattail

Salvinia

Mosaic Flower

11 Question
30 seconds
Q.


Elodea

Blue Flag 

Pondweed

Egeria

12 Question
30 seconds
Q.


Waterlilies

Duckweed

Amazon Frogbit

Coontail 

13 Question
30 seconds
Q.


Lotus

Moneywort 

Water chestnut

Waterthymes

14 Question
30 seconds
Q.


Coontail

Pondweed

Salvinia 

Fanwort

15 Question
30 seconds
Q.


Japanese water iris 

Blue flag

Mosaic Flower

Lotus