Chapter 19: Phylum Arthropoda Flashcards
Arthropodization:
- Soft __ of the arthropod ancestors was stiffened by deposition of ____.
- cuticle
- protein and chitin
Arthropodization:
What had to provide flexibility?
- joints
Arthropodization:
- What was necessary to allow for growth?
- sequence of moots
Arthropodization:
-Molting required what?
-hormonal control
Arthropodization:
They hydroskeleton function was ___. Coelom ___ and was replaced by ____.
- lost
- regressed
- open sinuses
This phylum contains over / of all known species.
3/4
Fossil history dates them back to late ____.
Precambrian
They are _____ protostomes with well developed organ systems.
- eucoelomate
- They are segmented. Molecular analyses indicate ___ and arthropods evolved from ___ ancestors.
- annelids, different
What is the largest organism in this phylum?
The smallest?
- japanese crab
- follicle mite
They are the ____ diverse animal group due to abundance and wide ecological distribution.
- most
Some organisms in this phylum are agents of ___ and compete with __ for food.
- disease, humans
Some are beneficial. All modes of ____occur among arthropods but some are ___.
- food
- herbivorous
Division into subphyla is based on relationships between ___.
subgroups
Groupings among subphyla is based on ___ data.
molecular
Insects belong to what subphylum?
- Hexapoda
Spiders, ticks, horseshoe crabs and their relatives belong to what subphylum?
- Chelicerata
Lobsters, crabs, barnacles and others form what subphylum?
- Crustacea
Appendages may be under what two classifications?
- Uniramous
- Biramous
Describe what a uniramous limb is?
comprises a single series of segments attached end to end.
Describe what a Biramous limb is?
- branches into two, and each branch consists of series of segments attached end to end.
List the 6 Great Diversity and Abundance of Arthropods.
- versatile exoskeleton
- segmentation and appendages for efficient locomotion
- air piped directly to cells
- highly developed sensory organs
- complex behaviour patterns
- use of diverse resources through metamorphosis
Great Diversity and Abundance of Arthropods:
- Versatile exoskeleton:
- ____ is highly protective and jointed, providing mobility.
- It consists of an inner thick ___ and an outer thin ____.
- The procuticle has an ___ secreted before a moot and an ____ secreted after molting.
- Both layers of procuticle contain __ bound with __.
- The procuticle is ___,____ and protects against ___.
- __ content varies from 40% in insects and max 80% procuticle in crustaceans.
- ____ salts are responsible for hardness of procuticle of lobsters and crabs.
- Cuticle is __ between segments, allowing for movement at the__.
- What is Ecydsis or molting ?
- Arthropods typically moot how many times? What is a limit to ultimate body size?
- cuticle
- procuticle, epicuticle
- exocuticle, endocuticle
- chitin, protein
- lightweight, flexible, dehydration
- Chitin
- calcium
- thin, joints
- process of shedding outer covering and growing a new larger one
- weight
2) Segmentation and Appendages for Efficient Locomotion :
- Many ___ may be fused or combined into specialized groups called ___.
- Appendages are often highly specialized for what?
- Limb segments are ____ with internal ___.
- Appendages may function in ___, ___, __ or ___.
- somites, tagmata
- division of labour
- hollow levers, striated muscles
- sensing, food handling, walking or swimming.
