A
How many arthropods are there for every human?
160 million per human
What subphylum is no longer living
-Trilobita
In what kind of environments can arthropods be found?
In terrestrial, marine, freshwater, and desert environments.
Do velvet worms have segmentation?
They do not have segmentation.
These types of Arthropods are important in keeping insect populations from rapidly increasing.
Spiders
What are the differences between Arthropods and their sister taxa velvet worms and water bears?
water bears and velvet worms have a soft exoskeleton and appendages are not jointed
What are distinguished characteristics of the Subphylum Crustacea?
Chewing mandibles and antennae. (exp. Crabs, Lobsters, Krill)
What are three common physical traits that all arthropods have? (5 traits)
Segmented body, Hard Exoskeleton, Jointed appendages, open circulatory system, and dorsal brain.
Do water bears have segmentation? A head? Antennae?
They have segmentation, a head, and antennae?
What period was the first Arthropod fossil dated back to?
As far back as the Cambrian Period.
Which subphylum can be found almost everywhere?
Hexapoda, terrestrial and freshwater
What is Tagmosis?
Fusion of segments into body regions such as head, thorax, and an abdomen
What are uniramous appendages?
Appendage has single series of segments.
Many crustaceans have a unique exoskeleton that is made of what material?
Calcium Carbonate
What are two major evolutionary trends that occurred in Arthropods?
Tagmosis and Specialization of appendages in different body regions
What are the five arthropod subphyla?
Trilobita, chelicerata( scorpions/spiders), Myriapoda(centipedes/milipedes), crustacea(crabs/lobsters), and Hexapoda(insects)
What physical characteristics do the velvet worms have in common with arthropods?
Non living cuticles that cover the body.
What are biramous appendages?
Appendage with 2 branches
What unique feature do most of the hexapods have?
Most of them have wings.
What subphylum is characterized by an elongated trunk of many segments?
Subphylum Myriapoda: Centipedes and Millipedes.
What is the purpose of a nuptial gift?
In some arthropods the male will give a nuptial gift in order to try and persuade the female to let him reproduce or reproduce for a longer period of time
Where did Mr.Goodman go this semester and what did he study?
Mr.Goodman studied scorpions in Guatemala.
What does the Tagma consists of (3parts)?
Cephalon, Thorax, Pygidium
Do velvet worms and water bears have hard exoskeletons?
No, they have soft exoskeletons
What are the differences between a Centipede and a Millipede?
Centipedes are carnivores, characterized by one pair of legs behind their heads and move swiftly. The first pair of legs are maxillipeds, modified into fangs and used to inject venom into prey. Millipedes tend to be herbivores, move much slower, secrete poison, produce hydrogen cyanide, and the presence of diplosegments (double trunk segments).