Chelicerates

Question 1

Characteristics of Chelicerates (spiders)

Answer 1

Chitin exoskeleton, periodically moulted, segmented body, jointed paired appendages, sexes usually separate, species numbered in millions

Question 2

3 main classes of Chelicerata

Answer 2

Merostomata - horseshoe crabs
Arachnida - scorpions, spiders, ticks, mites
Pycnogonida - sea spiders

Question 3

Horseshoe crabs

Answer 3

blood is used for detecting bacterial endotoxins, eggs are carried by the currents back up the beaches while adults and juveniles scrape the sand for anything to eat

Question 4

Order scorpionidae

Answer 4

sting injects neurotoxins that block Na and K channels, nocturnal carnivorous, use sting to kill prey, gas exchange performed with the use of book lungs

Question 5

Order Araneae

Answer 5

Predator on other arthropods, poison gland associted with each chelicera, digest prey externally ingest resultant fluids

Question 6

Spiders can be split into 2 different types what?

Answer 6

Web-builders (longer legs detect movement have bad eyes) and hunters (thicker legs, highly developed eyes)

Question 7

both scorpions and spiders do what to find a mate

Answer 7

they boogie

Question 8

difference between ticks and mites

Answer 8

ticks are blood sucking ectoparasites and mites are herbivorous or scavengers