Question | Answer |
Sponges have little in common with other animals- they probably
"Blank" separately from all other animals | Evolved |
Most sponges are asymmetrical and "blank" | sessile |
A sponge body is a hollow "blank" with one opening at the top and many small pores along the body tube | tube |
Sponges have no tissues, or organ systems; they often do have "blank" or "blank" for protection and support. | Spicules and Spongin |
Sponges pull microscopic food particles and oxygen in through their "blank"; wastes are removed through the opening at the top of the sponge. | pores |
Most sponges are "blank" that produce both sperm and eggs, though sponges can't fertilize their own eggs; sponges can also reproduce asexually by budding or regeneration. | Hermaphrodites |
"Blank" are invertebrates that includes corals, sea anemones, jellyfish, hyrdas , and Portuguese man of wars | Cnidarians |
Most cnidarians live in "blank" water; some live as individuals, while others live in colonies. | Salt |
Most cnidarians have two body "blanks" | forms |
The polyp is "blank" -shaped and sessile | vase |
The "blank" is bell-shaped and free swimming | medusa |
Cnidarians have one body opening and "blank" symmetry | radial |
Two cell layers are arranged into "blank" ; a digestive cavity breaks down food | tissues |
A "blank" net carries impulses and connects all organism parts | nerve |
Most cnidarians have "blank" with stinging cells to help capture food | tentacles |
Cnidarians are "blank" | predators |
Cnidarians "blank" both sexually and asexually | reproduce |
Cnidarians have existed more than 600 million years; most of their fossils are "blank" | corals |
Coral reefs form as corals secrete their hard external "blank" on those of earlier generations | skeletons |
Coral reefs are "blank" ecosystems that protect shorelines from erosion | diverse |
Corals reefs provide "blank" such as shells, pearls, and chemicals for human medical uses. | resources |