Zoology - Study Guide - Unit 1
-Know Phylum (and class if discussed) or give an example of an organism in each group. -Know general characteristics -Look over Sponge Lab -Ascaris Dissection, general anatomy Test is Wednesday, April 3rd.
Terms in this set (45)
Skeletal elements that some mesenchyme cells of a sponge body wall secrete. May be made of calcium carbonate or silica. Provide support/framework. Sponges are classified by type of spicules.
Cells of sponges that create water currents and filter food.
The attached, usually asexual, stage of a cnidarian.
Usually, the sexual stage in the life cycle of cnidarians. The jellyfish body form.
The class of platyhelminthes with members that are all parasitic with no digestive tract. Have great reproductive potentials. Tapeworms.
-Often intermediate host life cycle
-Examples: Leech, tubeworm
-Gastropoda (stomach foot)--Chiton=polyplacophora similar to gastropoda
-Bivalvia (two shells)--Clam
-Cephalopoda (head foot)--octopus, squid
-(4th class) Scaphopoda (shovel foot)--tusk shells
The generation of a new cell or organism by the fusion of two haploid cells so that genes are inherited from each parent.
Reproduction of an organism without fusion of gametes by fission, budding, or some other method not involving the fertilization of gametes.
An organism in which both male and female sex organs occur in the same individual. Hermaphroditic.
Having separate (male and female) sexes. Male and female organs are in separate individuals.
Diagram depicting the evolutionary history of taxa. Derived from phylogenetic systematics (cladistics).
Descending from a single ancestor
An assemblage of organisms that includes multiple evolutionary lineages. Polyphyletic assemblages usually reflect insufficient knowledge regarding the phyylogeny of a group of organisms.
Animals in which the anus froms from, or in the region of, the blastopore. Often characterized by enterocoelous coelom formation, radial cleavage and the presence of a dipleurula-like larval stage.
Animal in which the embryonic blastopore becomes the mouth. Often possesses a trochophore learva, schizocoelous coelom formation and spiral embryonic cleavage.
Cells containing pigment that, through contraction and expansion, produce temporary color changes.
The region of an annelid responsible for secreting mucus around two worms in copula and for secreting a cocoon to protect developmental stages. Swollen section in a mature earthworm.
A common opening for excretory, digestive and reproductive systems.
A fluid-filled body cavity lined by mesoderm.
Digestive organ that stores food.
outer covering of worm/protective layer
A group of nerve cell bodies outside the central nervous system. Located on ventral side of worm.
Digestive organ that breaks down food.
A parasitic larva of certain freshwater bivalve mollusks, which attaches itself by hooks and suckers to the fins or gills of fish.
A modified arm of some male cephalopods that is used in sperm transfer.
A naturally occuring peptide in the salivary glands of medicinal leeches that has a blood anticoagulant property.
The outer fleshy tissue of mollscs that secretes the shell. The mantle of cephalopods may be modified for locomotion.
A segmental organization of body parts.
The specialization of body regions of a metameric animal for specific functions. The head of an arthropod is specialized for feeding and sensory functions, the thorax is specialized for locomotion and the abdomen is specialized for visceral functions.
Covering--"mother of pearl"
covering over eggs
A circulatory system found in insects and some other invertebrates in whcih blood is not confined to vessels in part of its circuit. Blood bathes tissues in blood sinuses.
A circulatory system in an animal (vertebrates) in which blood is confined to vessels throughout its circuit.
concentration of nerve cells that moves the foot.
A structure in the female reproductive system that stores sperm received during copulation.
A structure associated with the male reproductive tract that stores sperm prior to its release.
Dividing walls on inside of earthworm
Hairlike modifications of an arthropod's exoskeleton that may be set into a membranous socket. Displacement of a seta intitiates a nerve impulse in an associated cell.
Spiny head worm
live in the intestine of mammals.
A larval stage characteristic of many molluscs, annelids, and some other protostomate animals.
The rounded prominence at the anterior margin of the hinge of a bivalve shell. It is the oldest part of the shell.
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