AP BIOLOGY

Detailed explanation-1: -Worms are members of several invertebrate phyla, including Platyhelminthes (flatworms), Annelida (segmented worms ), Nemertea (ribbon worms), Nematoda (roundworms, pinworms, etc.), Sipuncula (peanutworms), Echiura (spoonworms), Acanthocephala (spiny-headed worms), Pogonophora (beardworms), and Chaetognatha (arrowworms).

Detailed explanation-2: -Invertebrates that you may be familiar with include spiders, worms, snails, lobsters, crabs and insects like butterflies.

Detailed explanation-3: -An invertebrate is a cold-blooded animal with no backbone. Invertebrates can live on land-like insects, spiders, and worms-or in water. Marine invertebrates include crustaceans (such as crabs and lobsters), mollusks (such as squids and clams), and coral.

Detailed explanation-4: -Worldwide in distribution, they include animals as diverse as sea stars, sea urchins, earthworms, sponges, jellyfish, lobsters, crabs, insects, spiders, snails, clams, and squid.

Detailed explanation-5: -Insects, annelids, mollusks, echinoderms, protozoa, crustaceans, and arachnids are all invertebrates.