Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
What characteristics do biologists use to classify arthropods?
|
the number and structure of their body segments and appendages, particularly their mouthparts
|
|
|
what are the 3 main groups of arthropods?
|
crustaceans
spiders insects |
|
|
What is true about crustaceans?
|
two pairs of branched antennae
chewing mouthparts called mandibles two or three body sections |
|
|
the largest group of crustaceans are the....
|
decapods?
|
|
|
horseshoe crabs, spiders, ticks, and scorpions are grouped as...
|
chelicerata
|
|
|
What is true about chelicerates?
|
four or five pairs of legs
mouthparts called chelicerae |
|
|
What is the function of chelicerae?
|
contains fangs and are used to stab and paralyze prey
|
|
|
the appendages near the mouth that are usually modified to grab prey are called...
|
pedipalps
|
|
|
What arthropods do arachnids include?
|
spiders, mites, ticks, and scorpions
|
|
|
What is true about spiders and silk?
|
spiders spin silk into cocoons for eggs
spinning webs seems to be a programmed behavior spinnerets are organs that contain silk glands |
|
|
Scorpions have pedipalps that are enlarged into...
|
claws
|
|
|
What do ticks transmit that cause Rocky Mountain spotted fever and Lyme disease?
|
bacteria
|
|
|
Centipedes, millipedes, and insects are all grouped as...
|
Uniramia
|
|
|
How many pairs of legs does each body segment of most centipedes have?
|
a few to 100 pairs
|
|
|
How many pairs per segment do millipedes have?
|
two
|
