(Q).
Fact 1: Echinoderms have a unique water vascular system with tube feet.  Fact 2: Another group of echinoderms are the echinoids.  Given the two facts above, answer the question "Which has a unique water vascular system?" with the following options:  - roots  - trees  - Conifers  - Echinoids  - fur seals  - Most plants  - ferns  - bushes
(A).
Echinoids


(Q).
Fact 1: Thirst is used to make an animal realize that it needs to replenish its bodily water by the body.  Fact 2: Generally, athletes wait for their sense of thirst to signal that it's time to drink.  Given the two facts above, answer the question "animals replenish their bodily water after a signal that it's time to what?" with the following options:  - breathe  - health  - move  - drink  - Cooking  - survive  - rest  - sleep
(A).
drink


(Q).
Fact 1: Astem is used to store water by some plants.  Fact 2: Seasonal flowering plants planted.  Given the two facts above, answer the question "What do some flowers use to store most of their water?" with the following options:  - fibrous  - lipids  - roots  - sodium  - keratin  - solutes  - fibers  - stems
(A).

stems