Science 7 - Chapter 9 Concepts and Challenges in Life Science
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| What do we call the ability to re-grow lost body parts? | Regeneration
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| What are the stages of complete metamorphosis? | egg - larva - pupa - adult
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| What are the stages of incomplete metamorphosis? | egg - nymph - adult
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| What is a nymph? | A miniature version of the adult
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| What do we call organisms that feed on or harm the organisms that they live on? | Parasites
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| What is the radula? | A rough tongue like organ that is used by many mollusks to get food
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| What are three characteristics of arthropods? | They have an exoskeleton, jointed legs, a segmented body and an open circulatory system.
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| What two phyla are made up of organisms that have two cell layers with a jelly like layer in between? | Porifera (sponges) and Cnidaria
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| What is metamorphosis? | The changes in form and size that occur during the stages of development in organisms like insects.
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| What structures do echinoderms use to move and capture their food? | Tube feet
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| What are the three tissue layers found in the body of a worm? | Endoderm - inner layer; Mesoderm - middle layer; Ectoderm - outer layer
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| What are the two body forms of cnidarians? | Medusa (jellyfish) and polyp (sea anemone)
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| What are the hard, needle like structures that are found in sponges? | spicules
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| What types of organisms have exoskeleton? | Arthropods - examples= insects, arachnids, crustaceans
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| All cnidarians have special cells in their tentacles. What are those cells called? | Cnidocytes or nematocysts
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| What phylum does the planarian belong to? | Platyhelminthes (flatworms)
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| What phylum do animals like squid, clams and octopus belong to ? | Mollusks
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| What is the name of the middle section of an arthropods body? | thorax
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| What are the setae of an earthworm? | Setae are the tiny bristles on each segment that help the earthworm move
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| What are the specialized cells that are found in sponges and have flagella called? | collar cells
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| What are some features that parasites have that help them attach to their host? | Hooks and suckers
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| What is the only invertebrate animal that we have studied that has a closed circulatory system? | The earthworm
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| What organism did we study that had five hearts? | The earthworm
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| What type of organism has pores that help it eat? | Sponges (poriferans)
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| What type of worm was a hermaphodite (has both male and female parts)? | Earthworm
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| Where do sponges live? | In the ocean
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| What are the names of the three phyla of worms that we learned about? | platyhelminthes (flatworms); nematoda (roundworms) ; annelida (segmented worms)
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| Give three examples of parasites. | Tick, tapeworm, leech, heartworm, hookworm
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| What is the name of the roundworm phylum? | Nematoda
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| What are the three main classes of mollusks? | Gastropods (one part shell, snail); Bivalvia (two part shells, clams); Cephalopods (little or no shell, squid)
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| What body part in mollusks becomes the shell? | The mantle
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| What phylum does a clam belong to? | Mollusk
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| What phylum do lobsters belong to? | Arthropods
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| What phylum do sand dollars belong to? | Echinoderms
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| What phylum do planaria belong to? | Platyhelminthes
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| What phylum do jellyfish belong to? | Cnidarians
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| What phylum do sponges belong to? | Porifera
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| What phylum do squid belong to? | Mollusk
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| What phylum do spiders belong to? | Arthropods
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| Which of the invertebrate phyla has the largest number of different species? | Arthropods
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| Which phylum do heartworms belong to? | Nematoda
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| Which phylum do segmented worms belong to? | Annelids
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| What does the word annelid mean? | Little rings
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| What does the word echinoderm mean? | Spiny skin
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