Flashcards in Week 4 Deck (54)
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1
Annelids include
Earthworms
Leeches
Polychaetes
2
Most distinctive characteristic of annelids
Segmentation
3
Annelids have small bristle appendages that occur in pairs on lateral/ventral surfaces called
Setae
4
Setae are filled with what for defense
Poison
5
Leeches that lack segmentation and have no setae
Hirudineans
6
Most diverse/abundant phylum of animals
Anthropods
7
Anthropoids are successful in habitats because of their
Segmentation which allows division of labor between regions
8
What is used to classify anthropods
Arrangement of segments and structure of appendages
9
What is the exoskeleton of Arthropods made of?
Chitin
10
What does chitin do?
Protects from predators and environment
Prevents desiccation
Place for muscle attachment
11
Chelicerates are
Spiders
Scorpions
Horseshoe crabs
12
Why are crustaceans different from anthropods
Biramous appendages
13
What does biramous mean
Double branched appendage
14
5 anterior pairs of crustacean appendages
First antennae
Second antennae
Mandibles
Maxillae
Maxillipeds
15
What is the shape of crustacean hearts?
Diamond shaped
16
Group of anthropods that can breathe through channels in body. Includes myriapods and hexapods
Tracheata
17
Includes centipedes and millipedes
Myriapoda
18
Appendages modified for feeding
Maxillipeds
19
Largest group of organisms on earth
Insects (hexapods)
20
3 desperate body regions of insects
Head
Thorax
Abdomen
21
Deuterostomes
Echinoderms
22
Deuterstomes differ in embryonic development because
They develop anus to mouth
23
What ability do echinoderms posses
Ability to regenerate after losing portions of their body
24
5 classes of echinoderms
Asteroida
Ophiuroidea
Echinoidea
Crinoidea
Holothruroidea
25
Chordata 4 shared key features
Dorsal hollow nerve cord
Notochord
Pharyngeal slits
Postanal tail
26
2 classes of invertebrates
Tunicates
Lancelets
27
Chondrichthyes are
Echotherms and sharks
28
Vertebrates have a distinctive
Head and vertebral column
29
Jawless fishes with cartilaginous endoskeletons
Agnathans
30
