Fact 1: Adult sponges are sessile. Fact 2: Most echinoderms are sessile or sedentary marine forms with radial symmetry as adults. Given the two facts above, what are sedentary?
OPTIONS:
- barnacles
- fish
- fur seals
- animals
- adult sponges
- chickens
- gazelles
- birds

Answer: adult sponges

Fact 1: Most invertebrates have a nervous system. Fact 2: Jellyfish and insects are invertebrates. Given the two facts above, what have a nervous system?
OPTIONS:
- fur seals
- viruses
- animals
- jellyfish
- bacteria
- ducks
- mammals
- phytoplankton

Answer: jellyfish

Fact 1: Sound can be used for communication by animals. Fact 2: Many insects communicate with sounds. Given the two facts above, how do insects talk?
OPTIONS:
- water
- murmur
- mostly
- slow
- magma
- sound
- move
- eyes

Answer:
sound