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Biology > Classification of Animals- Invertebrates > Flashcards

Classification of Animals- Invertebrates Flashcards

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1
Q

Do invertebrates have a backbone

A

No

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2
Q

What are the four classes of invertebrates

A

1) Nematodes
2) Molluscs
3) Annelids
4) Arthropods

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3
Q

What is the most diverse group of invertebrates

A

Arthropods

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4
Q

What is the feeding method of the annelids

A

Herbivores

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5
Q

What is the feeding method of the nematodes

A

Mainly parasites

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6
Q

What is the feeding method of the mollusc

A

Mainly herbivores– some carnivores

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7
Q

What are the nematodes specialised for

A

Feeding and reproducing

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8
Q

Where are nematodes often found

A

Often found in the gut of other animals (Parasites)

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9
Q

What is the function of the mouth in nematodes

A

Has sucking mouthparts for drinking blood

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10
Q

What is the function of the long muscles in nematodes

A

For wriggling movement

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11
Q

What is the function of the long thin body in nematodes

A

So not washed out of host’s intestines

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12
Q

What is the function of the mucus covered body in nematodes

A

To resist attack by host’s digestive juices

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13
Q

Do nematodes have segmented bodies

A

No

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14
Q

List the features of a nematode

A

1) Mouth
2) Long muscles
3) Long thin body
4) Body covered with mucus

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15
Q

List the features of annelids

A

1) Long cylindrical bodies
2) Segmented bodies
3) Chaetae
4) Mouth
5) Anus
6) Clitellum

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16
Q

What is the function of the long cylindrical body in annelids

A

Covered with a mucus layer to help to stop drying out

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17
Q

What is chaetae

A

Stiff bristles made out of chitin

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18
Q

What is the function of chaetae in annelids

A

Used for locomotion and anchorage

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19
Q

What is the function of the clitellum in annelids

A

Secretes cocoons for enclosing eggs

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20
Q

What is the clitellum

A

Thick ring found in the skin of most annelids

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21
Q

What are the features of a mollusc

A

1) Hard shell
2) Muscular foot
3) May have eyes on tentacles

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22
Q

What is the shell of a mollusc made up of

A

Calcium carbonate

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23
Q

What is the function of the shell in a mollusc

A

Protects the soft body of the mollusc from predators and drying out

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24
Q

What is the function of the mouthparts in molluscs

A

To scrape at vegetation

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25
Q

What is the function of the foot in a mollusc

A

It is a muscle with a slimy covering so that it can move by creeping over the surface

26
Q

What does arthropod mean

A

It means segmented foot

27
Q

What are the subgroups under arthropods

A

1) Crustaceans
2) Arachnids
3) Insects
4) Myriapods

28
Q

How many legs do crustaceans have

A

Five or more pairs of legs

29
Q

How many pairs on antennae do crustaceans have

A

Two pairs of antennae

30
Q

What type of eyes do crustaceans have

A

Compound eyes

31
Q

What does the body of a crustacean consist of

A

Head, Thorax and Abdomen

32
Q

What is the function of jointed limbs in crustaceans

A

Flexible to help with feeding

33
Q

What is the function of eyes in crustaceans

A

Important sensors in aquatic environment

34
Q

What is the function of gills under the shell in crustaceans

A

Allows uptake of oxygen from water

35
Q

What is the function of the hardened, serated edge to claw in crustaceans

A

Can hold onto slippery food and break open shells of molluscs

36
Q

What is the function of carapace in crustaceans

A

A thick hardened shell for protection against predators

37
Q

How many pairs of legs do myriapods have

A

Ten or more pairs of legs on body segments

38
Q

What is the function of the mouthparts in myriapods

A

Hard edges for biting vegetation or other animals

39
Q

How many pairs of antennae do myriapods have

A

One pair

40
Q

What is the function of the antennae in myriapods

A

Important sense organs

41
Q

Do myriapods have segmented bodies

A

Yes

42
Q

What is the function of segmented bodies in myriapods

A

Flexible for movement and wriggling around

43
Q

What is the function of hard-exoskeletons in myriapods

A

Protection against predators

44
Q

How many pairs of legs do insects have

A

Three pairs of legs

45
Q

How many pairs of wings do insects have

A

Two pairs of wings

46
Q

What type of eyes do insects have

A

Compound eyes

47
Q

What is the function of the eyes in insects

A

To detect food and avoid predators

48
Q

What is the function of mouthparts in insects

A

Specialised for feeding

49
Q

What is the function of the antennae in insects

A

Sense chemicals in the environment

50
Q

What does the body of insects consist of

A

Head, thorax and abdomen

51
Q

Do insects go through metamorphosis

A

Yes

52
Q

What is metamorphosis

A

An abrupt change in form or structure of an organism

53
Q

What are the four stages of metamorphosis

A

1) Egg
2) Larva
3) Pupa/ crysalis
4) Adult

54
Q

How does metamorphosis explain why there are so many insect species

A

Adult and larvae do not compete for the same resources and hence can multiply and diversify rapidly.

55
Q

How many pairs of legs do arachnids have

A

Four pairs of legs

56
Q

What type of eyes do arachnids have

A

Simple eyes, several pairs

57
Q

What is the function of the eyes in arachnids

A

To detect prey

58
Q

How many pairs of antennae do arachnids have

A

Arachnids dont have antennae

59
Q

What does the body of arachnids consist of

A

Head, Thorax, Abdomen

60
Q

What is the function of the chelicerae in arachnids

A

For biting/ poisoning prey

61
Q

What do all of the invertebrates have in common

A

1) Segmented bodies
2) Segments carry jointed limbs
3) Hard exoskeleton

Biology (6 decks)

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