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Chapter 15
Exam 2
14
Biology
Undergraduate 1
02/26/2014

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Term
Mesenchyme
Definition
Fluid/gelatinous material that fills the pseudocoelum
Term
Cuticular jaws
Definition
Hardened jaws unique to Gnathifera
Term
Eutelic
Definition
Rotifers have a fixed number of cells once they reach adulthood.
Term
Benthic
Definition
Non-moving; more primitive
Term
Pelagic
Definition
Moving; more derived
Term
Desiccation
Definition
Extreme drying-out of an organism
Term
Encystment
Definition
Rotifers can surround itself with a cyst to survive desiccation and extreme temperatures
Term
Trochal discs
Definition
The corona is often a pair of trochal discs
Term
Corona
Definition
Head portion of rotifers
Term
Lorica
Definition
Protective external case
Term
Mastax
Definition
Muscular pharynx equipped with hard jaws
Term
Trophi
Definition
Hard jaws used to capture prey
Term
Parthenogenesis
Definition
A form of asexual reproduction without fertilization.
Term
Hypodermic penetration
Definition
Mating is by hypodermic penetration; sperm are injected into the pseudocoel of the female.
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