Question

1. an ____________ helps an organism survive in its environment.
2. name two uses of color as an adaptation.
3. an animal that does not have a backbone is called an ____________.
4. name an animal that lives in water and often grows on rocks. ____________.
5. why are sponges called animals?
6. a ____________ lives on or in another organism and causes harm to that organism.
7. a ____________ is a living thing that supports a parasite.
8. name three types of worms.

__________, ________, __________

1. an ____________ is an opening through which waste leaves the body.
2. how many hearts does an earthworm have? ____________
3. the word ____________ means \soft - body.\
4. name 6 types of mollusks.

__________, ________, ________, ________, ________, __________

Explanation:

1. Adaptation is a characteristic that helps an organism survive in its environment.
2. Color can be used for camouflage (to blend in with the surroundings) and for warning (to signal danger to predators).
3. An invertebrate is an animal without a backbone.
4. Barnacles are animals that live in water and often grow on rocks.
5. Sponges are called animals because they are multicellular, heterotrophic (get food from outside), and have no cell walls.
6. A parasite lives on or in another organism and causes harm.
7. A host is a living thing that supports a parasite.
8. Three types of worms are flatworms, roundworms, and segmented worms.
9. An anus is an opening through which waste leaves the body.
10. An earthworm has five pairs of hearts (or ten small hearts).
11. The word "mollusk" means "soft - body".
12. Six types of mollusks are snails, clams, oysters, squids, octopuses, and scallops.

Answer:

1. adaptation
2. camouflage, warning
3. invertebrate
4. barnacles
5. They are multicellular, heterotrophic, and have no cell walls.
6. parasite
7. host
8. flatworms, roundworms, segmented worms
9. anus
10. five pairs (or ten)
11. mollusk
12. snails, clams, oysters, squids, octopuses, scallops