bio practical 2 pt 2

phylum porifera

sponges

level of organization for porifera

cellular

body plan of porifera

asymmetrical, no true body plan

key feature of porifera

pores for water flow

examples of phylum cnidaria

Anemones, corals, jellyfish, hydra

level of organization for cnidaria

tissue level

body plan of cnidarians

sac-like body with one opening (gastrovascular cavity)

symmetry of cnidarians

radial symmetry

cnidarians body cavity?

no true coelom (gastrovascular cavity only)

two stages of cnidarians?

polyp and medusa

which stage is dominant in hydra: polyp or medusa?

polyp

what is extracellular digestion

digestion outside cells (in cavity), then absorbed

what are cnidocytes?

stinging cells

what are nematocysts?

stinging structures inside cnidocytes

what’s a polyp

sessile, tube shaped

what is a medusa?

free swimming, umbrella shaped

phylum platyhelminthes common name

flatworms

level of organization for platyhelminthes

organ level

body plan of platyhelminthes

flattened body

symmetry of platyhelminthes

bilateral

does phylum platyhelminthes have any body cavity?

acoelomate (no body cavity)

what is a planarian?

a free living flatworm (regeneration, hermaphroditic)

what are tapeworms

intestinal parasites

what is a scolex

a tapeworms head region

what do hooks and suckers do for tapeworms?

aid in attaching to a host

what are proglottids on a tapeworm

body segments

mature vs gravid proglottids

mature: has reproductive organs

gravid: filled with eggs

phylum nematoda common name

roundworms

level of organization for phylum nematoda

organ system level

body plan of phylum nematoda

cylindrical

does phylum nematoda have symmetry?

bilateral

does phylum nematoda have a body cavity?

pseudocoelomate

what is ascaris

a parasitic roundworm

what are vinegar eels?

free living nematodes

do rotifers have a complete digestive tracts?

yes

what is a corona?

a ciliated “wheel” structure that phylum rotifera uses for feeding

type of reproduction for phylum rotifera

parthenogenesis (asexual is common)

level of organization for phylum rotifera

organ system

does phylum rotifera have a body cavity?

pseudocoelomate

does phylum rotifera have symmetry?

bilateral

phylum mollusca level of organization

organ system

phylum mollusca body plan

soft body

does phylum mollusca have symmetry

bilateral

does phylum mollusca have a body cavity?

coelomate

is phylum mollusca a protosome or a deuterostome?

protosome (form their mouths first)

what 3 parts do all mollusks have

foot

visceral mass

mantle

major mollusk groups?

gastropods (snails)

bivalves (clams)

cephalopods (octopus, squid)

level of organization for phylum Annelida?

organ system

body plan for phylum Annelida

segmented

does phylum annelida have symmetry?

bilateral

does phylum Annelida have body cavity?

Coelomate

are phylum Annelida protosome or deuterostome?

protosome

what is the clitellum?

phylum Annelidas reproductive structure (thick band)

what is the prostomium?

the head region of phylum Annelida

level of organization for phylum Anthropoda

organ system

body plan of phylum Arthropoda

segmented with jointed appendages

does phylum Arthropoda have symmetry?

bilateral

does phylum Arthropoda have body cavity?

coelomate

is phylum Arthropoda a protosome or deuterosome?

protosome

main feature of arthropods?

exoskeleton

types of metamorphosis (arthropods)

complete: egg to larva to pupa to adult

incomplete: egg to nymph to adult

major arthropod groups?

insects

arachnids

crustaceans

myriapods

phylum Exhinodermata level of organization

organ system

does phylum Echinodermata have symmetry?

Radial (adults), Bilateral (larvae)

does phylum Echinodermata have a body cavity?

coelomate

is phylum Echinodermata a protostome or deuterstome?

deuterostome (forms anus first)

what is the water vascular system?

phylum Echinodermatas hydraulic system for movement

function of madreporite?

phylum Echinodermatas water intake

function of ampulla?

how phylum Echinodermata pumps water

function of tube feet

phylum Echinodermataa movement and feeding

how many stomachs does a sea star have? (phylum Echinodermata)

2

phylum chordatas level of organization

organ system

does phylum chordata have symmetry?

bilateral

what defines chordates

notochord

dorsal hollow nerve cord

gill structures

post-anal tail

subphylum Urochordata common name?

Tunicates (sea squirts)

Subphylum Cephalochordata common name

lancelets or Amphioxus

what are class chondrichthyes?

cartilaginous fish (sharks, rays)

what are classs Osteichthyes?

bony fish

class amphibia key traits

moist skin

metamorphosis

live in water and land

class reptilia key traits

scales

amniotic eggs

terrestrial

Class Aves key traits

feathers

wings

endothermic

class mammalia key traits

hair

mammary glands

endothermic

what is a coelom?

a fluid filled body cavity completely lined by mesoderm

what did acoelomate mean?

no body cavity (Platyhelminthes)

what does pseudocoelomate mean?

‘false’ body cavity (nematoda, rotifera)

what makes a body cavity false?

not being completely lined with mesoderm

what does coelomate mean?

true body cavity (mesoderm lined cavity)

what phyla contain coelomate

mollusca

annelida

arthropoda

echinodermata

chordata

what does protostome mean?

mouth forms first in the embryo

what does the blastopore become in a protostome

the mouth

what is the cleavage pattern of a protostome?

spiral, determinate

examples of protostomes

mollusca, annelida, arthropoda

what does deuterostome mean?

anus forms first in embryo

what does the blastopore become in a deuterostome?

the anus

cleavage pattern of deuterostomes?

radial, indeterminate

examples of deuterostomes

echinodermata, chordata

list the phyla

Porifera

Cnidaria

Platyhelminthes

Nematoda

Rotifera

Mollusca

Annelida

Arthropods

Echinodermata

Chordata

Chordata classes

Chondrichthyes

Osteichthyes

Amphibia

Reptilia

Aves

Mammalia

how do you correctly write genus and species on paper

underline both words

capitalize Genus only

Lowercase species