TERMS
Define: Exoskeleton
A body covering, typically made of chitin, that provides support and protection.
Which appendage of the crayfish aids in the reproductive process?
The SWIMMERETES play a major role in this species reproductive process!
What is the main reason that Arachnids produce webs?
Their webs are what they use to CATCH their PREY.
Which order of insects is what biologists call social insects?
Order HYMENOPTERA: bees, ants, and wasps
True or False:
Adult Echinoderms lack cephalization.
True!
Define: Statocyst
The organ of balance in a crustacean.
What is the function of the GREEN GLAND?
The GREEN GLAND cleans the blood of impurities as it circulates through the crayfish. The gland then dumps the impurities back into its surroundings.
True or false: Only some species of spiders have silk glands, others lack this organ and cannot spin webs at all.
FALSE: ALL spiders have silk glands. However there are certain species that are unable to spin webs, but this is not because of a lack of silk glands.
Insects have NO RESPIRATORY SYSTEM! How do they still get plenty of oxygen???
Insects have an elaborate system of interconnecting tubes called TRACHEAS.
How many classes are there in Phylum Echnodermata?
a. 7
b. 9
c. 11
A. 7
Define: Gonad
A general term for the organ that produces the gametes
Why can the open circulatory system be a disadvantage to crayfish and other arthropods?
Animals with open circulatory systems rely on gravity to make their blood flow properly. If an organism ends up on its back for an extended amount of time, their tissues will die.
What is the main difference between the anatomy of a crayfish and a spider?
The presence of SILK GLANDS and SPINNERETS.
Members of the Order ORTHOPTERA, (grasshoppers and crickets), have what kind of wings?
LEATHERLIKE wings.
Name four types of Echnoderms.
1. Sea Stars
2. Sand Dollars
3. Sea Urchin
4. Sea Cucumber
5. Sea Lily
6. Sea Daisy
Define: Cephalothorax
A body region composed of the head and thorax fused together.
What are the 6 appendages of a crayfish?
*you must list at least four, and the functions of two of them!
The 6 appendages of a Crayfish are...
1. Walking legs
2. Swimmerets
3. Uropods & Telson
4. Chelipeds
5. Anetennules
6. Antennae
What are the 3 types of webs which spiders spin?
1. Sheet Web
2. Tangle Webs
3. Orb Web
What are the 4 characteristics which separate insects from other members of Phylum Anthropoda?
1. Three pairs of legs
2. Usually winged at some point in their life
3. One pair of antennae
4. Three body segments: head, thorax, abdomen
What is a WATER vascular system?
A network of water-filled canals that branch into structures called tube feet. This is exclusive to echinoderms.
What is the difference between a COMPOUND and SIMPLE eye, use descriptions from the definitions.
A COMPOUND eye is made of many lenses, each with a very limited scope, whereas the the SIMPLE eye has only one lens.
Crayfish and most other crustaceans are equipped with appendages with double membranes. What special ability does this feature allow?
*be specific!
When the crayfish loses an appendage, the membrane seals the resulting hole and keeping blood in the body. This allows the crayfish to REGENERATE the appendage.
Name the four characteristics of the organisms of class Arachnida.
1. Four pairs of walking legs.
2. A cephalothorax instead of separate head and thorax
3. No antennae!
4. Respiration preformed by organs called "book lungs"
What is the difference between COMPLETE and INCOMPLETE metamorphosis?
pg. 574
What are the four functions of TUBE FEET?
1. Locomotion
2. Respiration
3. Circulation
4. Feeding