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44 Cards in this Set

  • Front
  • Back
taxonomy
the science of classification and nomenclature used
modern classification system groups organisms based on what
evolutionary relationships
subdivisions of classification
kingdom
phylum (division)
subphylum (subdivision)
class
order
family
genus
species
scientific name
Genus species in italics

scheme developed by Carolus Linnaeus
Five kingdom classification
monera, protista, plantae, fungi, animalia
Why are viruses not included in any of the five kingdoms of classification?
viruses are not considered living things
kingdom Monera
prokaryotes
single-celled
reproduce asexually
kingdom Protista
eukaryotes
single-celled or colonies
no tissue differentiation
may be heterotrophic or photosynthetic (or both-Euglena)
may or may not be motile
kingdom Fungi
Eukaryotes
multicellular
differentiated
nonmotile
saprophytic or parasitic.
varying and unique modes of reproduction
Cell walls composed of chitin.
Kingdom Plantae
Eukaryotes
multicellular
differentiated
nonmotile
photosynthetic
alternation of generations with a distinct embryonic phase
Kingdom Animalia
Eukaryotic
multicellular
motile
heterotrophic
differentiated tissues
structure of viruses
DNA or RNA and some essential enzymes surrounded by a protein coat
cyanobacteria
blue-green algae

Moneran
photosynthetic, but no chloroplasts
no flagella
cell wall
can survive extreme temperatures
bacteria
moneran
cell wall
single loop of DNA
no nucleus
play a role in biogeochemical cycles
classified by morphology: cocci (sphere), bacilli (rod), spirilla (spiral), duplexes, clusters (staph), chains (strep)
protozoa
Protist

heterotrophic

includes rhizopods (amoebas) and ciliophors (ciliates)
algae
Protist

photosynthetic

include phyto-plankton, important producers in marine environments

some can be multicellular and are placed in the plant kingdom
slime molds
resemble both fungi and protists

coenocytic (many nuclei) mass of protoplasm

contain animal-like and plantlike stages
asexual reproduction of fungi
sporulation
general characteristics of all animals
differentiation of tissues, organs, and organ systems

alimentation (eat and digest bulk food)

bilateral symmetry- most animals

nervous system and sensory organs

chemical-coordinating system to maintain homeostasis
porifera
animalia- sponges

two layers of cells
pores
sessile
low degress of cellular specialization
Cnidarians
animalia- hydra, jellyfish, coral

digestive sac with one opening
ectoderm and endoderm layers of cells
tentacles and stinging cells
net nerves
Platyhelminthes
animalia- flatworms

bilaterally symmetrical
three layers of cells, including mesoderm
simple true nervous system with a "brain" ganglion
Nematoda
animalia- round worms- hookworm, trichina

long digestive tubes and anus
solid mesoderm
simple nerve cords
Annelida
animalia- segmented worms- earthworms, leeches

coelom - true body cavity
well-defined circulatory, nervous, and excretory systems
Mollusca
animalia- Mollusks-clams, snails, squid

soft bodies with mantle that secretes calcareous exoskeletons
gills
chambered heart
pair of ventral nerve cords
Arthropoda
animalia- arthropods- insects, arachnids, crustaceans

jointed appendages
chitinous exoskeleton
open circulatory system (sinuses)
insects
arthropods

three pairs of legs
tracheal tubes and spiracles for air breathing
arachnids
arthropods

four pairs of legs

book lungs
crustaceans
arthropods

segmented body
variable number of appendages
gills
echinoderms
animalia- starfish, sea urchin

radially symmetrical
water-vascular system
regeneration of parts
possible origin of chordates
Chordates
have a stiff dorsal rod-notochord-present at some stage of embryologic development
paired gill slits, tail

split invertebrates and vertebrates
chordate invertebrates
lancets, tunicates (amphioxus)
vertebrates
chordates, most advanced

vertebrae replace the notochord during development and become the backbone

a bony case forms around the brain
fish
vertebrate

two-chambered heart
gills
external fertilization
jawless fish
retain notochord throughout life
cartilage endoskeleton
no jaws
sucking mouth
include Agnatha
cartilaginous fish
fish with jaws and teeth
reduced notochord exists between segments of cartilage vertebrae
bony fish
fish with scales
no notochord in adult form
full bony skeleton
amphibia
vertebrate

larval stage-tadpole-lives in water, gills, tail, no legs

adult had lungs, legs, 3-chambered heart, no scales

external fertilization in water
reptiles
terrestrial
lungs
leathery eggs-internal fertilization
poikilothermic
scales
three-chambered heart
birds
homeothermic
four-chambered heart
feathers
internal fertilization, shelled eggs
mammals
vertebrate
homeothermic
feed offspring with milk produced in mammary glands
monotremes
egg-laying mammals
horny bills
milk glands with no nipples
Marsupials
pouched mammals
embryo begins development in the uterus and completes development attached to nipples in the abdominal pouch
Placental mammals
mammals with embryos that fully develop in the uterus