Diversity - Animalia Flashcards
(25 cards)
general characteristics
- multicellular eukaryotes
- sexual reproduction
- heterotrophs
- motile during some stage of life
- respond to external stimuli
body symmetry
radial and bilateral
ex of radial symmtery
starfish
ex of bilateral symmetry
earthworm
2 body layers incl
ectoderms and endoderms
3 body layers incl
ectoderms (nerves), mesoderm (muscle and blood), endoderm
invertabrates
no backbone, makes up 98% of the animal kingdom
- jellyfish, sponges, worms, insects
vertabrates
have a backbone, makes up 2% of animalia
- fish, birds, amphibians, mammals
- phylum chordata
7 classes in vertabrates
- agnatha
- chondrichthyes
- osteichthyes
- amphibia
- reptilia
- aves
- mammalia
porifera
2 layered invertebrates that are asymmetrical and are non motile as adults
- no tissues and organs
- external fertilization produces microscopic motile larvae
ex. sponges
cnidaria
2 layered invertabrates that have some radial symmetry
- has a nervous and muscular system so they can sense their environment
- external fertilization and are filter feeders
ex. jellyfish, coral, anemones
platyhelminthes
3 layered invertabrates that have bilateral symmetry and are predators or parasites
- no digestive system but has specialized tissue (excretory, nervous system, brain)
- habitat: host
ex. flatworms, tapeworms
nematoda
3 layered bilateral worms that are parasitic and very abundant
- body has cuticle
- internal fertilization
- feeds off blood and nutrients from host
ex. roundworms
annelida
3 layered bilateral invertabrates that have all systems but skeletal/respiratory
- gasses diffuse thru skin -> moist skin
- filter feeders
ex. earthworms, segmented worms
mollusca
3 layered bilateral invertebrates that have soft bodies with tentacles
- all systems but sensory
ex. slugs, snails, octopus
echinodermata
3 layered radial invertebrates that have no head, brain, respiratory, circulatory systems
- gasses and waste diffuse thru thin membranes of “feet”
- marine
ex. starfish
arthropoda
3 layered bilateral invertebrates that have an exosklelton made of chitin, and are the most diverse group of invertebrates
- segmented legs
- well developed jaws
- nervous system and senses
ex. insects, shellfish, spiders
phylum chordata
has backbone (notochord), roughly 50 000 species
agnatha
most primitive vertabrate that only have gills but no skeleton
- invasive in great lakes
- parasitic: preys on larger fish like trout
ex. hagfish, lamprey eel
chondrichthyes
no-skeleton (cartilagenous) fish that only have paired fins and jaw
- live in marine envronments
- internal fertilizaiton
- scavengers and predators
ex. sharks, rays
osteichthyes
bony fish with jaws and scales, with paired fins and nostrils
- external fertilizaiton
- swim-bladder that allows fish to control bouyancy
- can be herbivores and develop into carnivores when mature
ex. pike, salmon
amphibia
mix between fish and reptile, has a skeleton made of bone and cartilage, gas exchange thru skin by diffusion and only forms lungs when mature
- no scales
- external fertilization
- undergo metapmorphasis (frog ex.)
ex. frogs, salamanders
reptilia
many are tetrapods (4-limbed) and have scales and a bony skeleton
- internal fertilization
- lungs for gas exchange
- cold blooded
ex. snakes, turtles
aves
lightweight, hollow bones with FEATHERS and are bipedal
