Arthropoda (9,10)

Question 1

How are Coelomate Protostome body cavities formed?

Answer 1

formed by the splitting of mesoderm during embryonic development.

Question 2

What type of body cavity do Arthropods possess?

Answer 2

Coelomate Protostomes

Question 3

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

Answer 3

Phylum Arthropoda

Question 4

What is the exoskeleton of arthropods made of?

Answer 4

Chitin.

Question 5

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

Answer 5

Tagmatization

Question 6

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

Answer 6

Tracheal system.

Question 6

What is Tagmatization?

Answer 6

A process in which the body segments fuse into functional groups

Question 7

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

Answer 7

Mainly chitin, with some areas strengthened by calcium carbonate

Question 8

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

Answer 8

2
- Prosoma
- Opisthoma

Question 9

What are the six pairs of appendages found in Chelicerates?

Answer 9

-Chelicerae
-Pedipalps
- four pairs of walking legs.

Question 10

Which subphylum includes horseshoe crabs and sea spiders?

Answer 10

Subphylum Chelicerata

Question 11

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

Answer 11

Class Arachnida

Question 12

How many pairs of walking legs do Arachnids have?

Answer 12

Four pairs

Question 13

What are the two main body regions of arachnids?

Answer 13

Cephalothorax and abdomen

Question 14

What structures do spiders use to inject venom into prey?

Answer 14

Chelicerae with terminal fangs

Question 15

What organ is used by spiders for respiration?

Answer 15

Book lungs or tracheae

Question 16

What organ helps spiders excrete waste?

Answer 16

Malpighian tubules

Question 17

What sensory structure do spiders use to detect environmental vibrations?

Answer 17

Sensory setae (sensilla)

Question 18

How do male spiders transfer sperm during reproduction?

Answer 18

By using pedipalps

Question 19

What material do spiders produce that is stronger than steel?

Answer 19

Silk

Question 20

What are two dangerous spider species mentioned in the presentation?

Answer 20

Black widow (Latrodectus) and Brown recluse (Loxosceles)

Question 21

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

Answer 21

The postabdomen (metasoma)

Question 22

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

Answer 22

Pectines

Question 23

What type of reproduction is observed in scorpions?

Answer 23

Viviparous (giving birth to live young)

Question 24

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

Answer 24

Prosoma broadly joined to the opisthosoma, giving an ovoid appearance

Question 25

How many legs do adult mites and ticks have?

Answer 25

Eight legs

Question 26

What structure do ticks use to attach to their hosts?

Answer 26

Hooked mouthparts (hypostome).

Question 27

What are the four classes within Subphylum Myriapoda?

Answer 27

Diplopoda, Chilopoda, Symphyla, Pauropoda.

Question 28

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

Answer 28

One pair of legs per segment.

Question 29

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

Answer 29

Two pairs of legs per segment.

Question 30

How do spiders digest their prey?

Answer 30

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

Question 31

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

Answer 31

To suck in liquefied prey after external digestion.

Question 32

How many spinnerets do spiders typically have for silk production?

Answer 32

Six to eight spinnerets.

Question 33

How long can scorpion courtship last?

Answer 33

From 5 minutes to several hours.

Question 34

How long does it take for scorpions to mature?

Answer 34

1 to 8 years.

Question 35

Are harvestmen venomous?

Answer 35

No, they are not venomous.

Question 36

How does the exoskeleton of female ticks differ from males?

Answer 36

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