SP. Trilobita & Arachnida Review

Categorize the following animals into the correct class within Subphylum Chelicerata.

Groups:

(a) C. Merostomata

,

(b) C. Pyconogonida

,

(c) C. Arachnida

• Sea spiders

• Spiders

• Horseshoe crabs

• Scorpions

• Ticks & mites

Tags

NGSS.MS-LS4-2

Which of the following subphylum represents an extinct organism that looks like horseshoe crab larva.

• Subphylum Trilobita

• Subphylum Arachnida

• Subphylum Crustacea

• Subphylum Myriapoda

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Horseshoe crabs have a _________, which they use for protection from the ocean's predators.

• Carapace

• Telson

• Jointed appendages

• Iron tipped chelipeds

What is the function of a telson in horseshoe crabs?

• To change directions when swimming

• To propel forward

• To house toxins to protect from predators

• To bury in the sand to hide

Tags

NGSS.MS-LS4-4

What temperatures will you find sea spiders in?

• Cold

• Warm

• Hot

• Variable (Hot & cold)

Sea spiders have a ___-part body plan.

• 1

• 2

• 3

• 3.5

How do sea spiders feed?

• Crushing mandibles

• Injecting toxins with their proboscis

• Sucking out the insides of their prey with their proboscis

• Injecting toxins using their abdomen

Tags

NGSS.MS-LS2-3

What body parts make up the arachnida body plan?

• Head

• Cephalothorax

• Thorax

• Abdomen

Once arachinds inject toxins/enzymes into their prey, what happens?

• They're liquified

• They're soldified

• They become immobile so the arachnida can eat them whole

• They become immobile so they can eat their head

Neurotoxins attack the _____ system.

• Nervous

• Musculatory

• Circulatory

• Endocrine