Biology Deck 3 Flashcards
(25 cards)
three domain system
bacteria, Archaean, eukarya
eukarya 4 kingdoms
plantar, fungi, protista, animalia
6 characteristics of living things
1) composed of 1 or more cell
2) reproduce using DNA
3) acquire or process energy
4) respond to stimuli
5) maintain homeostasis
6) have the capacity to change over time
systematics/ taxonomy
branch of science concerned with classification
population
a group of individuals of the same species living in a a shared environment
community
populations of different species living and interacting in a a shared environment
ecosystem
a group of biological communities interacting with one another
biotic
organisms
abiotic
physical environment
prokaryotes
small, single cell, not membrane bound, early life,
2 kinds of prokaryotes
bacteria and Archaea
eukarya
larger, single or mulitcelled, bound nucleus, 4 kingdoms
Anthony van Leeuwenhoek
dutch cloth merchant and amateur scientist, discovered microorganism and bacteria, first microscope
archaea
single celled, endosymbiosis, not part of known food web
endosymbiosis
lives in extreme conditions
chemoautotroph
manufactures food from chemicals
ex) bacteria / protista
photoautotroph
manufactures food from sunlight
ex) protista, plants
absorptive heteroph
an organism which externally takes enzymes into its environment to digest organism materials which are then absorbed
ex) protista, fungi
ingestive heteroph
obtains nutrients prior to digesting
ex) animal, protista
vestigial structures
organs with no function in one organism but function in other organisms
symmetry (2 kinds)
radial - aquatic, lack directed movement
bilateral - unidirection movement for finding food and avoiding predators
degenerative evolution
species evolve into less complex forms over time
homology
physical characteristics that derive from the same structures
molecular similarities
systematics examines genetic similarities between DNA sequences and chromosome structures
