animal diversity Flashcards
Animals are ____ _____ _______
multicellular, eukaryotic
heterotrophs
Most animals
– are capable (3)
of locomotion at some time
during life cycle
– can respond adaptively to external stimuli
– can reproduce sexually
Blastopore is
Opening from embryonic gut to outside
In protostomes the Blastopore develops
into the mouth
In deuterostomes the Blastopore develops
becomes the anus
Phylum Porifera includes
Sponges
– animals characterized by flagellate collar cells
choanocytes) are
flagellate collar cells
Sponge body has (3)
sac with tiny openings for water to enter HAS choanocytes
– central cavity (spongocoel)
– open end (osculum) for water to exit
Sponge cells_____ associated
– do not form ____ ____
loosley, true tissues
Phylum Cnidaria are Characterized by (3)
radial symmetry
– two tissue layers
– cnidocytes (cells containing nematocysts)
Phylum Cnidaria Gastrovascular cavity has
single opening for mouth and anus
Phylum Cnidaria Nerve cells
form irregular, nondirectional
nerve nets
what are examples of Phylum Cnidaria
hydra, sponges
Phylum Ctenophora examople
comb jelly
comb jellyes have _____ symmetry
bilaterial
Cephalization is
Evolution of a head Evolution of a head
_____ _____ show beginnings of cephalization)
flat worms
why is Cephalization important
Increases effectiveness of bilateral animal
– to actively find food, shelter, mates
– to detect enemies
Phylum Mollusca usually have (3)
Soft-bodied animals – usually covered by a shell Ventral foot – for locomotion Mantle – covers visceral mass (body organs)
Class Gastropoda (of Phylum Mollusca ) examples
snails, slugs, and their relatives
Class Bivalvia (of Phylum Mollusca ) have
Two-part shell
– hinged dorsally
– encloses bodies
Suspension feeders
Class Bivalvia (of Phylum Mollusca ) examples
aquatic clams, scallops, oysters
Class Cephalopoda (of Phylum Mollusca ) examples
squids, octopods, Nautilus
Class Cephalopoda (of Phylum Mollusca ) have
Active, predatory swimmers
Tentacles surround the mouth
common name for Phylum Annelida
Segmented Worms
Phylum Annelida examples
Aquatic worms, earthworms, leeches
Phylum Annelida have (3)
Conspicuously long bodies
Segmentation
– both internally and externally
Large, compartmentalized coelom
are commonly known as _________ and are _______ to humans
Roundworms)
Parasitic
Phylum ArRRRrthropoda have (3)
Segmented animals with paired, jointed
appendages
Armorlike exoskeleton of chitin
Molting necessary for arthropod to grow
ArRRRrthropoda examples
Myriapods,Arachnids
Subphylum Crustacea examples
Lobsters, crabs, shrimp, pill bugs,barnacles
Subphylum Crustacea have
Body with cephalothorax and abdomen
Most have five pairs of walking legs
Subphylum Hexapoda are commonly known as
insects - including Metamorphosis
why are insects so biologically sussesful (6)
their exoskeleton, segmentation,
specialized jointed appendages, ability to
fly, and metamorphosis
