Are U A Proto or a Deutro
Are arthropods protostomes or deuterostomes?
What is protostomes
Functions in protection, support and movement and is strengthened further by dispositional hardening and is often secreted by the epidermis
What is the chitinous exoskeleton?
The 4 main cycles of ecdysis.
What is 1. preecdysis, 2. ecdysis, 3. postecdysis and 4. intermolt?
What are the 6 classes of Superclass Crustacea?
What is Malacostraca, Branchiopoda, Copepoda, Ostracoda, Branchiurra and Cirripedia?
What is Thoracia (free-living barnacles) and Rhizocephalans (parasitic barnacles)?
The overall name given for the organisms that undergo protostomal development. Consists of nematomores, rotifers, velvet worms and arthropods.
What is ecdysozoa?
There are two types of jointed appendanges. One is found in crustaceans, horseshoe crabs and trilobites while the other is unbranched and found in insects.
What is biramous and uniramous jointed appendages?
Calcification and hardening of the new exoskeleton
What is sclerotization?
What is Subphylum Chelicerata?
Example. Horseshoe crabs
This kind of larvae is present in hermaphroditic free-living barnacles, where the eggs are fertilized inside the mantle cavity and that are released into the water column where they use thoracic appendages for swimming before attaching to a substrate on shore.
What is nauplii larvae?
What is ecdysis?
Promotes production of a new cuticle and separation of an old cuticle.
What is ecdyosone?
This characteristic is unsegmented and bears 6 pairs of appendages with the first being modified for reproduction and the others providing constant flow of water over he gills by book gills.
What is the opistosoma?
This strategy of Rhizocephalans block reproduction by its host completely or in part, leads to an alternation of host behavior where the infected crab grooms, protects and ventilates the Rhizocephalans' egg believing it to be their own.
Parasitic castration.
Embryonic development of a protostome undergoes fixed or determinate develop of the blastomere, a spiral cleavage, schizocoely and
What is the blastopore becomes the mouth in the adult?
What is molluscs grow by increasing the surface area, while growth is continuously occurring underneath the exoskeleton and must grow by molting (or shedding the other layer)?
Differences between y-organ limb regeneration and x-organ limb regeneration.
What is the "y" is located in the head and produces ecdysone and the "x" is located in the eye stalks that inhibits production of ecdysone?
The completely extinct subphylum that has a uniform morphology and biramous appendages at each segment.
This is another Rhizocephalan parasitism in which the infected male crabs display maternal behavior.
What is feminization of males?
The steroid responsible for ecdysis
What is ecdysteroids?
Every arthropod has a compound eye. What is the compound eye made of?
What is ommatidium? (Bonus: Ommatidium consists of cornea or lens that focuses on objects far away, photoreceptors, shielding pigments and neurons that go to the optic ganglia)
What do the proenzymes do during ecdysis?
It will digest the old cuticle when the epidermis secrete new epicuticle and molting fluid.
What makes the Crustaceans distinctive?
What is:
- cephalothorax
- thoracopods
- pleopods
The nauplii larvae are released and undergo 4 molts into a female cyprid that attaches to host and grows into a root-like mass called intern. The female gonads grow and enlarge pressing against host dermis until the host is inhibited from molting and the male cyrpids are attracted to externa.
What is the Rhizocephalan life cycle?