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Comparative Zoology > Lecture 9 - Phylum Arthropoda (1) > Flashcards

Lecture 9 - Phylum Arthropoda (1) Flashcards

1
Q

How are Coelomate Protostome body cavities formed?

A

formed by the splitting of mesoderm during embryonic development.

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2
Q

What type of body cavity do Arthropods possess?

A

Coelomate Protostomes

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3
Q

What is the most diverse phylum with over 1.1 million species?

A

Phylum Arthropoda

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4
Q

What is the exoskeleton of arthropods made of?

A

Chitin.

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5
Q

What process involves the fusion of body segments into functional groups?

A

Tagmatization

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6
Q

What system in arthropods allows for direct oxygen delivery to tissues?

A

Tracheal system.

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6
Q

What is Tagmatization?

A

A process in which the body segments fuse into functional groups

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7
Q

What is a key feature of the exoskeleton of Subphylum Trilobita?

A

Mainly chitin, with some areas strengthened by calcium carbonate

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8
Q

How many Tagmata do Chelicerates possess, and what are they called?

A

2
- Prosoma
- Opisthoma

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9
Q

What are the six pairs of appendages found in Chelicerates?

A

-Chelicerae
-Pedipalps
- four pairs of walking legs.

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10
Q

Which subphylum includes horseshoe crabs and sea spiders?

A

Subphylum Chelicerata

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11
Q

Which class of Chelicerata includes spiders, scorpions, and ticks?

A

Class Arachnida

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12
Q

How many pairs of walking legs do Arachnids have?

A

Four pairs

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13
Q

What are the two main body regions of arachnids?

A

Cephalothorax and abdomen

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14
Q

What structures do spiders use to inject venom into prey?

A

Chelicerae with terminal fangs

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15
Q

What organ is used by spiders for respiration?

A

Book lungs or tracheae

16
Q

What organ helps spiders excrete waste?

A

Malpighian tubules

17
Q

What sensory structure do spiders use to detect environmental vibrations?

A

Sensory setae (sensilla)

18
Q

How do male spiders transfer sperm during reproduction?

A

By using pedipalps

19
Q

What material do spiders produce that is stronger than steel?

A

Silk

20
Q

What are two dangerous spider species mentioned in the presentation?

A

Black widow (Latrodectus) and Brown recluse (Loxosceles)

21
Q

What part of a scorpion’s body contains its venomous sting?

A

The postabdomen (metasoma)

22
Q

What are the sensory organs used by scorpions to explore the ground and for sex recognition?

A

Pectines

23
Q

What type of reproduction is observed in scorpions?

A

Viviparous (giving birth to live young)

24
Q

What type of body fusion is observed in harvestmen (Order Opiliones)?

A

Prosoma broadly joined to the opisthosoma, giving an ovoid appearance

25
Q

How many legs do adult mites and ticks have?

A

Eight legs

26
Q

What structure do ticks use to attach to their hosts?

A

Hooked mouthparts (hypostome).

27
Q

What are the four classes within Subphylum Myriapoda?

A

Diplopoda, Chilopoda, Symphyla, Pauropoda.

28
Q

How many pairs of legs per segment do centipedes (Class Chilopoda) have?

A

One pair of legs per segment.

29
Q

How many pairs of legs per segment do millipedes (Class Diplopoda) have on their abdominal segments?

A

Two pairs of legs per segment.

30
Q

How do spiders digest their prey?

A

By externally liquefying prey tissues with digestive fluids before sucking them in\

31
Q

What is the function of the spider’s pharynx and pumping stomach?

A

To suck in liquefied prey after external digestion.

32
Q

How many spinnerets do spiders typically have for silk production?

A

Six to eight spinnerets.

33
Q

How long can scorpion courtship last?

A

From 5 minutes to several hours.

34
Q

How long does it take for scorpions to mature?

A

1 to 8 years.

35
Q

Are harvestmen venomous?

A

No, they are not venomous.

36
Q

How does the exoskeleton of female ticks differ from males?

A

Females are less sclerotized (softer) to expand when engorged with blood.

Comparative Zoology (22 decks)

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