Exam 2 Flashcards
Fertilized egg that contains building material only and is somehow assembled by an unknown directing force
Epigenesis
Epigenisis
The concept that the embryo contains building materials that are assembled
Series of progressive changes in an individual from its beginning to maturity
Development
True/False Fertilization involves the fusion of sperm and egg pronucleus
True
Repeated cell division in the embryo after fertilization process by which an embryo becomes a multicellular embryo with non-uniform cells
Cleavage
Large cytoplasmic mass is converted into small maneuverable
Blastomeres
Indirect development usually refers to the fact that there is larval stage during metamorphosis during which young in various larval stages are capable of feeding themselves
True/false
True
A cluster of cells that are created as a result of cleavage
Blastula
Conversion of a spherical blastula into 2 or 3 layered embryo germ layers form
Gastrulation
True/false Gastrulation in mammals is remarkably similar to Gastrulation in reptiles and birds
False
A third germ layer that is formed in some animals between the ectoderm and endoderm
Mesoderm
Has do with the formation of a coelom
Schizocoely & Enterocoely
Concept if hereditary materials is parceled out unequally to daughter cells
Rue Wiseman
The uneven distribution of cytoplasmic components in a zygote
Cytoplasmic Specification
True/False two basic types of development are mosaic development And regulative
True
Mouth first, spiral cleavage, mosaic development, Schizocoelous
Protostomes
Anus first, Radial cleavage, regulative development, enterocoelous
Deuterons tomes
Animal Body Plans Differ in
Grade Organization Body Symmetry Number of Embryonic layer Number of body cavities
Noncellular components of metazoan animas costs of body fluids and some kind of structural elements
Extracellular
A sheet of cells that cover an internal or external surface
Epithelial Tissue
Made up of few cells many extracellular fibers and a ground substance or matrix
Ex. Blood, lymph, adipose
Connective Tissue
A technique used for identifying species using standard gene sequences present in all animals
DNA Barcoding
An evolutionary tree based on the study of characters among species
Phylogeny tree
Character similarity resulting from a Common Ancestry
Homology
True/false An ancestral character shared by,ember of Claude is called symplesiomorphy
True
Sources of phylogenetic information
Comparative morphology, biochemistry, cytology
The process by which eukaryotes cells arose from prokaryotic cells
Sybiosis
3 different methods Protozoans Move
Flagella Cilia Pseudopodia
Process by which Protozoans receive nutrition
Phagotrophs or Osmotrophs
Phagotrophs
Feed on visible particles
Osmotrophs
Feed on soluble
First group of animals that have thought evolved multi cellular
Sponges & Placozoa
“Collar cells” that move water to bring food and oxygen while removing waste
Choanocytes
Simplest body organization class Calcarea
Asconoids
Sponge Classes
Calcarea Hexactinellida Demospongiae
Example of non directional nature of evolution
Sponges becoming carnivores
Name all of the TAxa
Kingdom Family Order Genus Species
