BIOL 2200 Exam 3 Questions and Answers Already Passed
animals - Answers multicellular heterotrophic organisms that lack cell walls
tissues - Answers groups of similar cells that act as a functional unit
cleavage - Answers a succession of mitotic cell divisions without cell growth between the divisions
blastula - Answers The hollow ball of cells marking the end stage of cleavage during early embryonic
development
gastrulation - Answers In animal development, a series of cell and tissue movements in which the
blastula-stage embryo folds inward, producing a three-layered embryo, the gastrula
gastrula - Answers an embryo at the stage following the blastula, when it is a hollow cup-shaped
structure having three layers of cells
larva - Answers an immature form of an animal that looks very different from the adult
metamorphosis - Answers A developmental transformation that turns an animal larva into either an
adult or an adult-like stage that is not yet sexually mature
Cambrian explosion - Answers wave of animal diversification occurring 535-525 MYA
bilaterians - Answers Member of a clade of animals with bilateral symmetry and three germ layers
body plan - Answers a set of morphological and developmental trait that are integrated into a functional
whole
radial symmetry - Answers body plan in which body parts repeat around the center of the body
ectoderm - Answers the outer germ layer that develops into skin and nervous tissue
endoderm - Answers the inner germ layer that develops into the lining of the digestive and respiratory
systems
mesoderm - Answers middle germ layer; develops into muscles, and much of the circulatory,
reproductive, and excretory systems
Diploblastic - Answers having two germ layers; ectoderm and endoderm
Triploblastic - Answers has three germ layers: the ectoderm, endoderm, and mesoderm
body cavity - Answers A fluid-containing space between the digestive tract and the body wall
coelom - Answers fluid-filled body cavity lined with mesoderm
, hemocoel - Answers The primary body cavity of most invertebrates, containing circulatory fluid
protostome development - Answers In animals, a developmental mode distinguished by the
development of the mouth from the blastopore; often also characterized by spiral cleavage and by the
body cavity forming when solid masses of mesoderm split
deuterostome development - Answers In animals, a developmental mode distinguished by the
development of the anus from the blastopore; often also characterized by radial cleavage and by the
body cavity forming as outpockets of mesodermal tissue.
spiral cleavage - Answers planes of cell division are diagonal to the vertical axis of the embryo
determinate cleavage - Answers results in cells that are committed to differentiating into a specific cell
type
radial cleavage - Answers cleavage planes are either parallel or perpendicular to the vertical axis of the
embryo
indeterminate cleavage - Answers results in cells that can still develop into complete organisms
archenteron - Answers The endoderm-lined cavity, formed during gastrulation, that develops into the
digestive tract of an animal
blastopore - Answers indentation that during gastrulation leads to the formation of the archenteron
General traits of animals - Answers -Multicellular heterotrophic eukaryotes
-Mobility
-ingest food
-no cell walls
-nerves and muscles(except sponges)
cephalization - Answers formation of a head: concentration of sensory elements and a brain
Edicaran biota - Answers 560-600 MYA, led to organisms like worms
Choanoflagellates - Answers closest living relatives of animals
animals appeared... - Answers 710 MYA
Mezozoic Era - Answers age of dinosaurs
Cenozoic Era - Answers diversification of mammals
Traits that drive diversity in animals - Answers -sensory organs
animals - Answers multicellular heterotrophic organisms that lack cell walls
tissues - Answers groups of similar cells that act as a functional unit
cleavage - Answers a succession of mitotic cell divisions without cell growth between the divisions
blastula - Answers The hollow ball of cells marking the end stage of cleavage during early embryonic
development
gastrulation - Answers In animal development, a series of cell and tissue movements in which the
blastula-stage embryo folds inward, producing a three-layered embryo, the gastrula
gastrula - Answers an embryo at the stage following the blastula, when it is a hollow cup-shaped
structure having three layers of cells
larva - Answers an immature form of an animal that looks very different from the adult
metamorphosis - Answers A developmental transformation that turns an animal larva into either an
adult or an adult-like stage that is not yet sexually mature
Cambrian explosion - Answers wave of animal diversification occurring 535-525 MYA
bilaterians - Answers Member of a clade of animals with bilateral symmetry and three germ layers
body plan - Answers a set of morphological and developmental trait that are integrated into a functional
whole
radial symmetry - Answers body plan in which body parts repeat around the center of the body
ectoderm - Answers the outer germ layer that develops into skin and nervous tissue
endoderm - Answers the inner germ layer that develops into the lining of the digestive and respiratory
systems
mesoderm - Answers middle germ layer; develops into muscles, and much of the circulatory,
reproductive, and excretory systems
Diploblastic - Answers having two germ layers; ectoderm and endoderm
Triploblastic - Answers has three germ layers: the ectoderm, endoderm, and mesoderm
body cavity - Answers A fluid-containing space between the digestive tract and the body wall
coelom - Answers fluid-filled body cavity lined with mesoderm
, hemocoel - Answers The primary body cavity of most invertebrates, containing circulatory fluid
protostome development - Answers In animals, a developmental mode distinguished by the
development of the mouth from the blastopore; often also characterized by spiral cleavage and by the
body cavity forming when solid masses of mesoderm split
deuterostome development - Answers In animals, a developmental mode distinguished by the
development of the anus from the blastopore; often also characterized by radial cleavage and by the
body cavity forming as outpockets of mesodermal tissue.
spiral cleavage - Answers planes of cell division are diagonal to the vertical axis of the embryo
determinate cleavage - Answers results in cells that are committed to differentiating into a specific cell
type
radial cleavage - Answers cleavage planes are either parallel or perpendicular to the vertical axis of the
embryo
indeterminate cleavage - Answers results in cells that can still develop into complete organisms
archenteron - Answers The endoderm-lined cavity, formed during gastrulation, that develops into the
digestive tract of an animal
blastopore - Answers indentation that during gastrulation leads to the formation of the archenteron
General traits of animals - Answers -Multicellular heterotrophic eukaryotes
-Mobility
-ingest food
-no cell walls
-nerves and muscles(except sponges)
cephalization - Answers formation of a head: concentration of sensory elements and a brain
Edicaran biota - Answers 560-600 MYA, led to organisms like worms
Choanoflagellates - Answers closest living relatives of animals
animals appeared... - Answers 710 MYA
Mezozoic Era - Answers age of dinosaurs
Cenozoic Era - Answers diversification of mammals
Traits that drive diversity in animals - Answers -sensory organs
