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9.16: Arachnids

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

arachnid

arachnid

Class of arthropods having four pairs of legs which includes the spiders, scorpions, and ticks.
cephalothorax

cephalothorax

Fusion of the head and thorax.
chelicerae

chelicerae

Fanglike appendages near the mouth that serve in feeding and defense.
diurnal

diurnal

Active in the daytime.
nocturnal

nocturnal

Active at night.
pedipalps

pedipalps

Appendages near the mouth that are modified for reproduction, catching prey, and other functions.
silk

silk

Threads spun by spiders to make webs, enclose their eggs, and to serve other functions.

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Description

Difficulty Level:

At Grade

Concept Nodes:

Grades:

7 , 8

Date Created:

Nov 29, 2012

Last Modified:

May 05, 2015
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