*Question*
Q: Chordates are defined by a set of four characteristics that are shared by these animals at some point during their? Choices: - death - response - birth - development A:
**Answer**
development

*Question*
Q: What function does the longer flagellae perform in dinoflagellates? Choices: - defends - grasps - attacks - propels A:
**Answer**
propels

*Question*
Q: What class of animal, including hydras and jellies, is considered the simplest to contain a nervous system? Choices: - fish - sponges - prokaryotes - cnidarians A:
**Answer**
cnidarians

*Question*
Q: Like mammals and birds, and unlike other reptiles, crocodiles have how many chambers in their heart? Choices: - one - six - two - four A:
**Answer**
four