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Zoology > Biodiversity - Anthropods and Echinoderms > Flashcards

Biodiversity - Anthropods and Echinoderms Flashcards

1
Q

true of false, the white shark is a vertebrate?

A

true

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2
Q

true of false the northern pacific sea start is a invertebrate?

A

True

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3
Q

how many species are there of anthropods?

A

1,000,000

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4
Q

examples of anthropods

3

A

lobster, spider, insects

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5
Q

are anthropods invertebrates?

A

yes

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6
Q

what are the features of an anthropod?

(insects, lobsters, spiders) 5

A
  • jointed legs
  • jointed exoskelton
  • waterproof cuticle
  • paired legs
  • developed brain
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7
Q

how does the anthropod (cricket) gut work?

3 steps

A
  1. food moves from mouth to fore gut
  2. crop stores and moisturises food and sends it to the mid gut
  3. then to hind gut where absorbtion and digestion occur
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8
Q

what type of heart do anthropods have?

A

dorsal heart with open system

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9
Q

what are the 4 main types of anthropod?

A
  • insects
  • myriapods
  • Chelicerata
  • crustaceans
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10
Q

examples of chelicerates

(anthropods) 3

A
  • spider
  • horeseshoe crabs
  • ticks
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11
Q

features of chelicerates

(anthropods) 4

A
  • cephalothorax and abdomen fused
  • no antennae
  • 4 legs and 2 feeding appandages
  • no legs on the abdomen
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12
Q

examples of crustaceans

(antropods) 2

A
  • lobsters
  • crabs
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13
Q

features of crustaceans

(anthropods) 6

A
  • 2 pairs of antennae
  • 3 sections
  • lots of mouth parts
  • thorax has legs
  • abdomen has swimming appendages
  • pincers
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14
Q

examples of Myriapoda

(anthropods) 2

A
  • centipedes
  • millipedes
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15
Q

features of Myriapoda

(anthropods) 1

A
  • highly segmented
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16
Q

features of insects

(antropods) 8

A
  • 3 regions
  • no legs on the abdomen
  • 1 pair of antennae
  • spiracles
  • efficent gas exchange
  • sophisticated sensory organs
  • well developed brain
  • wings
17
Q

what was the first organsim to develop wings? why were they useful?

A
  • insects
  • they could fill different arial niches
18
Q

what do wings allow?

3

A
  • escape from pedators
  • finding food
  • finding mates
19
Q

what made wings possible in insects?

5

A
  • muscel tissue
  • lightweight
  • small
  • efficent gas exchange
  • nervous and sensory systems for navigation
20
Q

true of false anthropods are deutrosomes?

A

false, theyre protostomes

21
Q

when did echindoderms and chordates seperate?

A

500 million years ago

22
Q

are echindoderms and chordates protostomes or deuterostomes?

A

deuterostomes

23
Q

what are the features of deuterostomes?

4

A
  • cell cleavage is radial (divide up)
  • cell fate indeterminate
  • body cavity from endoderm
  • anus forms before mouth
24
Q

examples of echinoderms

(deuterostomes) 2

A
  • star fish
  • sea urchin
25
Q

how many species are there of echinoderms?

star fish and urchins

A

7000

26
Q

features of echinoderms

5

A
  • adults radially symetrical
  • larvea bilaterally symetrical
  • 5 arms (pentamerously symmetrical)
  • endoskeleton made of calcareous plates
  • have canals and tubes
27
Q

what are the 3 systems in enchinoderms?

A
  • digestive
  • reproductive
  • water vasular system
28
Q

how does digestion work in echinoderms?

3 steps

A
  1. first stomach sits out of mouth (digestion starts outside the body)
  2. food goes up into upper stomachwhere digestion carries on
  3. the food goes down arms where absorbtion occurs
29
Q

what type of fertilisation do enchioderms use?

A

external

30
Q

features of chordata class

A
  • notochord
  • dorsal hollow nerve chord
  • pharyngeal slits
  • muscular post anal tail
31
Q

example of a chordata

A

sea squirt

32
Q

true or false vertebrates are chordates?

A

true

33
Q

how many different species are there of vertebrates?

A

40,000

34
Q

features of vertebrates

A
  • well developed brain
  • sensory organs
  • closed circulatory system
  • vertebral column forms main body axis

Zoology (7 decks)

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