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Science > Invertebrates > Flashcards

Invertebrates Flashcards

1
Q

What can be classifies into different groups?

A

Invertebrates

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2
Q

What are the different groups of invertebrates?

A

Poriferans, Cnidarians, Worms, Mollusks, Echinoderms, & Arthropods

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3
Q

What are the simplest invertebrates?

A

Poriferans or Sponges

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4
Q

These invertebrates belong phylum Porifera. What are these?

A

Poriferans

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5
Q

What does the word porifera mean?

A

“pore-bearing”

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6
Q

What is covered with many pores for tiny openings?

A

Sponge

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7
Q

What are some of the most unusual living thing found on Earth?

A

Sponges

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8
Q

What are invertebrates animals that usually have no body symmetry and never have tissues of organs?

A

Sponges

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9
Q

What is the thin, spiny structure that form the skeleton of many sponges?

A

Spicules

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10
Q

What is composed of many invertebrate animals with brilliant colors and strange shapes?

A

Cnidarian

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11
Q

What are examples of this phylum?

A

Jellyfishes, Corals, Hydras, and Sea anemones

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12
Q

These have two basic forms. What are these?

A

Vase-shaped polyp and Bow-shaped Medusa

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13
Q

What name comes from a Greek word meaning “to sting’?

A

Cnidaria

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14
Q

What has a hollow central cavity with only one opening called “mouth”?

A

Cnidaria

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15
Q

What is the special stinging structures that all cnidarians have?

A

Nematocyst

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16
Q

These are used to stun or kill prey. What is this?

A

Nematocyst

17
Q

What are soft-bodied organisms?

A

Coral

18
Q

What do they build using minerals in the water?

A

Hard and protective cover of limestone

19
Q

What is an underwater ecosystem in which diverse kinds of organisms live?

A

Reef

20
Q

What are the most common cnidarians?

A

Jellyfishes

21
Q

What can deliver a painful poison through their nematocysts located on their tentacles?

A

Jellyfishes

22
Q

What cnidarians use these stinging structures to catch their prey?

A

Jellyfishes

23
Q

What are cnidarians that spend their lives as polyps?

A

Hydras

24
Q

They live in freshwater. What are these?

A

Hydras

25
Q

What can move around with a somersault movement?

A

Hydras

26
Q

What are classified into three main phyla?

A

Flatworms, roundworms, & segmented worms

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