Week 1 Flashcards
biology is…
the study of life + (non-living parts of the environment)
organisms share…
common traits that define life
6 traits that define life
evolve, growth, reproduce, sense/respond to stimuli, get/use materials/energy,maintain organized complexity
__ cant get materials/energy, reproude, or grow by themseleves
also dont fall into eukaryotic cells/prokaryotic cells
viruses
viruses need to infect a what…
host cell
eukaryotiv cells are/have
plants, animals, fungi/a nucleus, plasma membrane, can be unicellular/multicellular
aomeba are
unicellular eukaryotes
people are
multicellular eukaryotes
prokaryotic cells..
are bacteria/archaea that lack organelles; are unicellular; and have ribosomes
ribosomes
presence /absence of them help create proteins and bacteria need them in order to exist
organisms get/use energy by 2 ways
humans: consumption/plants: photosynthesis
homeostasis
living things need to maintain internal environment
bacteria grow by
enlarging cells and dividing to reproduce (binary fission = asexual reproduction)
animals/plants grow by
increasing # of cells in bodies via cell division
development
an organism becomes more complex
dna
exists in living cells (NOT VIRUSES)
genes
specific units of dna that are the basic units of heredity
evolution
all living organisms evolve
mutations
changes in genes caused by dna errors/damesges to dna
natural selection
triats that allow them to survive better than others
adaption
structures/ physiological processes/ behaviors that aid in survival/reproduction
atom
smallest particle of an element that has all the properties of said element
atoms can combine to
form molecules
molecules
building blocks of each cell
cell
basic unit of life
cells can combine to form
tissues
tissues combine to form
organs
organs form
organ systems
earth’s organisma are classified into 3 domains
bacteria: prokaryotic unicellular (no nucleus/organelles)
archaea: prokaryotic unicellu;ar (no nucleus/organelles)
eukarya: muticellular eukaryotic (except for fungi/yeast/ameoba)
scientific method
observation/question/hypothesis/prediction/experiment/conclusion
regulating materials that enter or leave the cell is a propety of life
FALSE
prokaryotes dont have a what
ER (endoplasmic reticulum)
bacteria accomplish chemotaxis by
frequently stopping ad tumblinf to btter sense good conditions
some bacteria have __ that detoxify __ (break it down)
enzymes/hydrogen
thigmotrapism
turning/bending of plant/organism in response to touch stimulus