Name: Julie Maxwell
Classifying Arthropods Virtual lab (Week 8)
Go to the following website for completion:
http://www.mhhe.com/biosci/genbio/virtual_labs/BL_18/BL_18.html Upon completion of the Classifying Arthropods Virtual Lab, please answer the following questions thoroughly using complete sentences and proper grammar and spelling. Data Table
| Body Sections(1,2,3, or >3)| Walking Legs (6,8 or >8)| Other Appendages| Antennae(0,2 or 4)| Claws Present?| Jaws Present?| Class| Common Name| Specimen 1| | | | | | | | |
Specimen 2| | | | | | | | |
Specimen 3| | | | | | | | |
Specimen 4| | | | | | | | Beach Hopper|
1.Many species of arachnids are predators, but have no teeth or jaws. How do they obtain nutrients from their prey? They inject venom in the prey that paralyzes them then the predators suck out the nutrients they need. 2.Arthropods are the most diverse group of animals. Describe some characteristics of arthropods that may have contributed to their great evolutionary success. * The body segmented, the segments usually grouped in two or three rather distinct regions - making them highly mobile.
* Paired segmented appendages (from which the phylum gets its name) - making them ambulate & walk easily.
* Bilateral symmetry - making them relate to the environment quite easily.
* A chitinous exoskeleton, which is periodically shed and renewed as the animal grows - making them resistant to shock of hard objects.
* A tubular alimentary canal, with mouth and anus - accounting for good food digestion.
* The circulatory system an open one, the only blood vessel usually being a tubular structure dorsal to the alimentary canal with lateral openings in the abdominal region - ensures better perfusion and less chances of hemolysis due to their being highly mobile.
3.What are some advantages and disadvantages of having an exoskeleton?...