Chapter 19 Flashcards
Protostomes have this type of cleavage
spiral
Deuterostomes have this type of cleavage
radial
In protostomes, the blastopore becomes this….
mouth
In deuterostomes, the blastopore becomes this…
anus
This type of cleavage involves cytokinesis diagonal from vertical axis of embryo
spiral
This type of cleavage involves cytokinesis along vertical axis of embryo
radial
Type of cleavage where fate of each cell is determined early in development
determinate
Type of cleavage where fate of each cell is determined later in development and allows for identical twins
indeterminate
In protostomes, this forms from splitting of solid masses of mesoderm
schizocoelom
In deuterostomes, this forms as mesoderm cells bud of the archenteron
enterocoelom
What classes are included in Phylum Annelida? (H-O-P)
Hirudinea, Oligochaeta, Polychaeta
What classes are included in Phylum Mollusca? (BiGasCaP)
Bivalvia, Gastropoda, Cephalopoda, Polyplacophora
What classes are included in the Phylum Echinodermata? (A-H-O-E)
Asteroidea, Holothuroidea, Ophiuroidea, Echinoidea
What subphylums are included in the Phylum Arthopoda? C-C-U
Chelicerata, Crustacea, Uniramia
Key class in the subphylum Chelicerata
Arachnida
Key class in the subphylum Crustacea
Malacostraca
Key class in the subphylum Uniramia
Insecta
Serial repetition of body segments in Annelids
metamerism
These excrete waste in Annelids and Molluscs
metanephridia
How do Annelids do gas exchange?
across the body wall
Polychaetes are in what class?
Polychaeta
Earthworms are in what class?
Oligochaeta
Leeches are in what class?
Hirudinea
Clams, scallops, mussels are in what class?
Bivalvia
Snails and slugs are in what class?
Gastropoda
Chitons are in what class?
Polyplacophora
Octopi and squid are in what class?
Cephalopoda
Spiders, scorpions, and ticks are in what subphylum?
Chelicerata
Crayfish, crabs, lobsters are in what subphylum?
Crustacea
Beetles, buts, grasshoppers are in what subphylum?
Uniramia
Molluscs have what four distinct body parts?
head, foot, mantle/shell, visceral mass
Molluscs use these for gas exchange
gills
Mollusc larvae that are free swimming
trochophore
Arthropods have these fused body segments
tagmata
Arthropods have an exoskeleton made of this
chitin
Arthropods use these to excrete waste
Malpighian tubules
In Arthropods, the coelom is reduced to this
hemocoel
Spiders and ticks are in this class
Arachnida
Crabs and shrimp are in this class
Malacostraca
Insects are in this class
Insecta
Gradual metamorphosis has these three life cycle stages
egg, nymph, adult
Complete metamorphosis has these four life cycle stages
egg, larva, pupa, adult
Echinoderms have this type of vascular system
water
Echinoderms have this type of nervous system
nerve net
Echinoderms have a dermal exoskeleton made of these
ossicles
Sea stars are in this class
Asteroidea
Sea urchins are in this class
Echinoidea
Sea cucumbers are in this class
Holothuroidea
Brittle stars are in this class
Ophiuroidea
