life Flashcards
characteristics of life
biological and ecological hierarchy to life
made of cells
orgnised
energy transfer and transformation
cells/organisms re;roduce
cells/organisms/ecosystems grow and develop
cells/organisms interact with their environments/respond to stimuli
cells/organisms/ecosystems maintain homeostasis
form populations that can evolve/adapt
biological organization
atoms
molecule
macromolecule
organelle
cell (smalest unit considered alive, all new cells come from preexisting cells)
tissue (similar cells)
organ (contains two or more types of tissues)
organ system (organs that closely work together)
organism
ecological organisation
population (1 species in an area)
community (many living beings in an area)
ecosysteme (living and not living in an area)
biosphere (earth)
prokaryotic/eukaryotic
prokaryotic: no nucleus
bacteria (unicellular)
eukaryotic: yes nucleus
animals (multicellular
plants (multicellular)
fungus (most multicellular)
protist
virus not alive
photosynthetic/heterotrophic
photosynthetic: gets energy from sun
heterotrophic : gets energy fro other organisms
energy flow in ecosystem
light energy goes to producers aka autotrophs (ex plants)
producers get consumed by consumers (ex larvae)
consumers die and are consumed by decomposers (ex ground)
grow/development
grow: size/number of cells
development: all changes that take place during an organisms life
baby formuing phases
pre-embryonic period: cleavage and implantation (week 1-2)
embryonic period: tissues and organs form week (3-8)
fetal period: growth
biological/physical environment
biological: other living organisms
physical: abiotic component
stimulus
internal
external
chemical
physical
homeostasis
maintenance of relatively stable (margin of what body deems acceptable) internal environment despite continuous changes in external environment (dynamic equilibrium)
negative feedback : regulatory mechanism that returns a variable towards the target value to maintain homeostasis
positive feedback: loop that enhances the original stimuls, moves further away from target value, infriquent
evolution
POPULATIONS can evolve, not individuals
change in environment, best suited survive and offspring will have the traits
life domains
domain bacteria: prokaryotic
domain archaea: prokaryotic
domain eukarya: eukaryotic, subdivised into kingdoms ex fungus, plant, animal, protistan kingdoms
named after genera (closely related species) species (group of organisms with similar structure, behavior, function, in nature breed only with each other sort of)
Yeast domain?
Eukaria
