Arachnids
TRUE OR FALSE. Arachnids are beneficial to man.
What is TRUE? (because they eat harmful insects)
pair of appendages that assist chelicerae in their jobs and guide food toward an arachnid's mouth
What are pedipalps?
the best known cobwed weavers, known for female spiders eating their "husbands" after mating with them
What are widow spiders?
3 most common classifications of worms & worm-like creatures
a mollusk has these 3 characteristics
What is 1.muscular foot, 2.visceral hump, 3.mantle
distinguishing features of an arachnid
simple eye
4 pair walking legs
no antennae, no mandible, no wings
These spiders have chelicerae that move side to side ; their fangs point inward and cross in the middle
What are true spiders?
known for its characteristic red or orange hourglass- shaped marking on the underside of its abdomen
What is a black widow?
segmented worms like earthworms and leeches
What are annelids?
includes starfish, sand dollars and sea urchins; they have tube feet and external spines that grow from internal skeletons
What are echinoderms?
an arachnid's sense organs of touch, hearing and smell
What are setae?
These spiders have chelicerae that move up and down and fangs that point downward.
What is a mygalomorph?
What are tarantulas?
another name for flatworms
What is platyhelminth?
"stomach-footed" mollusks, including snails and slugs
What are gastropods?
An arachnid's respiratory structure made up of thin, flat folds of tissue arranged like the pages of a book.
What are book lungs?
uses for a spider's silk
What are
1.wrapping prey
2.making webs
3.forming egg sacs
What are scorpions?
What are nematodes?
mollusks that have the head and foot combined into a single structure (for example, the octopus)
What are cephalopods?
a pair of appendages used for seizing and crushing prey
What are chelicerae?
spider with a dark, violin-shaped marking on its cephalothorax
What is a brown recluse?
What are mites and ticks
a group of aquatic mollusks that include clams, oysters and mussels.
What are bivalves?
has slender tentacles with stinging cells called cnidocytes (example, jellyfish)
What are coelenterates?