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1. ZOOLOGY > Invertebrates > Flashcards

Invertebrates Flashcards

1
Q

Animals that don’t have a backbone, but some have harder outer shells or exoskeletons for protection

A

Invertebrates

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2
Q

Around ___% of all animals species are invertebrates

A

95%

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3
Q

Invertebrates are incredibly diverse, with over how many different phyla?

A

30

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4
Q

Most common phyla (8)

A

Porifera
Mollusca
Annelida
Echinodermata
Cnidarians
Platyhelminthes
Nematoda
Arthropoda

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5
Q

A phylum of primitive invertebrate animals commonly known as ____

A

Porifera
Sponges

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6
Q

Classes of sponges (4) and scientific name

A

Calcarea ( calcareous Sponges)
Hexactinellida (Glass sponges)
Demospongiae (Demosponges)
Homoscleromorpha (Encrusting sponges)

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7
Q

Second largest phylum of invertebrate animals, after anthropoda.

A

Mollusca

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8
Q

Are soft-bodied animals, typically with a muscular foot for locomotion, a mantle that secretes a calcareous shell, and visceral mass that contains the internal organs

A

Mollusca

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9
Q

Classes of mollusks (8)

A

Aplacophora
Polyplacophora
Monoplacophora
Bivalvia
Gastropoda
Scaphopoda
Cephalopoda
Hyolitha

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10
Q

Also known as ____ are a large phylum of invertebrate animals found in a variety of habitats, including marine, freshwater and terrestrial environment

A

Annelida
Segmented worms

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11
Q

Classes of annelids (3)

A

Polychaetes
Oligochaetes
Hirudinea

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12
Q

A phylum of marine invertebrates, easily recognizable by their radial symmetry and spiny skin.

A

Echinodermata

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13
Q

Echinodermata comes from the greek words ____meaning ___ and ___ meaning ___ a reference to their characteristics spines or bumps that cover their bodies

A

Echinos
Spiny
Derma
Skin

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14
Q

Classes of echinoderms and scientific name (5)

A

Asteroidea (sea stars)
Ophiuroidea (brittle stars)
Echinoidea (sea urchins and sand dollars)
Crinoidea (sea lilies and feather stars)
Holothuroidea (sea cucumber)

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15
Q

A phylum of aquatic invertebrates. They are known for their stinging cells called ____

A

Cnidarians
Nematocyst

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16
Q

Classes of cnidarians (4)

A

Anthozoa (sea anemones and corals)
Scyphozoa (true jellyfish)
Cubozoa (box jellyfish)
Hydrozoa

17
Q

Also known as ____ (from the greek ___ meaning ____“flat” and helminth meaning ___

A

Platyhelminthes
Flatworms
Platy
Helminth
Worm

18
Q

They are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates

A

Platyhelminthes

19
Q

Classes of flatworms (4)

A

Turbellaria (planarians)
Monogenea (monogenetic flukes)
Trematoda (flukes)
Cestoda (tapeworms)

20
Q

A phylum of invertebrate animals. Also known as ____ or ____

A

Nematodes
Roundworms
Eelworms

21
Q

They are one of the most abundant animal groups on earth, found in a wide variety of habitats including soil, freshwater, marine environment and even inside other animals as parasite

A

Nematoda

22
Q

Classes of nematodes (2)

A

Adenophorea
Secernentea

23
Q

Are invertebrates that make up about ___% of all the animals on earth

A

Arthropoda
75

24
Q

All share some common characteristics such as segmented bodies, jointed limbs and exoskeleton

A

Arthropoda

25
Q

Classes of arthropods (5)

A

Insecta
Arachnida
Chilopoda (centipede)
Diplopida (millipede)
Crustacea

26
Q

They are multicellular organisms that have a cellular grade of construction, meaning they lack true tissues and organs

A

Sponges

27
Q

Their bodies are permeated by ___ and ___ through which water flows

A

Sponges
Canals
Chambers

28
Q

Sponges are ___ that obtain nutrients from the water that passes through their bodies

A

Filter feeders

29
Q

These sponges have spicules made of calcium carbonate which is also the main component of seashells

A

Calcarea (calcareous Sponges)

30
Q

Typically small and delicate and are
Found in shallow marine waters

A

Calcarea (calcareous Sponges)

31
Q

These sponges have a skeletal network of six pointed spicules made of silica, which is also the main component of glass

A

Hexactinellida ( glass sponges)

32
Q

Found in deep, cold marine waters and can grow to be quite large

A

Hexactinellida ( glass sponges)

33
Q

The largest and most diverse class of sponges, containing about __% of all known sponge species.

A

Demospongiae (Demosponges)
90%

34
Q

Can have spicules made of silica or spongin or a combination of both.

A

Demospongiae (Demosponges)

35
Q

Found in a wide range of habitats from freshwater to deep sea

A

Demospongiae (Demosponges)

36
Q

The rarest and most recently recognized class of sponges with only about ___ known species.

A

Homoscleromorpha ( Encrusting sponges)
117

37
Q

Have simple body structure and lack spicules altogether

A

Homoscleromorpha (Encrusting sponges)

38
Q

Found in marine waters, where they encrust on ROCKS and other hard surfaces

A

Homoscleromorpha ( Encrusting sponges)

39
Q

Second largest and soft-bodies animals, typically with a muscular foot for locomotion, a mantle that secretes a calcareous shell, and a visceral mass that contains the internal organs

A

Mollusca

1. ZOOLOGY (11 decks)

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