This document contains 28 questions about the main groups of invertebrate animals, including their characteristics, examples, and importance. It asks about the six major groups of invertebrates like arthropods, mollusks, sponges, jellyfish, worms and echinoderms; the different coverings, habitats and roles of these groups; as well as specifics about insects, arachnids, crustaceans, bivalves, gastropods and cephalopods. The questions also cover pearl formation in mollusks and the uses and problems caused by various invertebrate groups.

1. QUESTIONS UNIT 7: INVERTEBRATES
1/ What is the main characteristic of invertebrates?
2/ What are the different coverings of invertebrates? Give examples.
3/ Name the six main groups of invertebrates.
4/ What are arthropods like?
5/ Where are the different habitats where we can find arthropods? Give
examples.
6/ What are the most important groups of arthropods?
7/ What are insects like? Give examples.
8/ What are arachnids like? Give examples.
9/ What are crustaceans like? Give examples.
10/ What are myriapods like? Give examples.
11/ How can arthropods help us?
12/ How can arthropods cause problems for us?
13/ What are mollusks like?
14/ What are mollusks habitats?
15/ What is one of the most special characteristics of mollusks related to
nutrition?
16/ Name the most important groups of mollusks.
17/ What are bivalves like? Give examples.
18/ What are gastropods like? Give examples.
19/ What are cephalopods like? Give examples.
20/ How can mollusks be helpful for us? Give examples.

2. 21/ What is nacre? How is a pearl formed?
22/ What are sponges like? Give examples.
23/ What are jellyfish like?
24/ What are polyps like?
25/ What are echinoderms like?
26/ Give 2 examples of echinoderms and explain them.
27/ What are annelids like? Give one example.
28/ Explain earthworms.