Unit 1 - Diversity of Living Things Flashcards
what are the three domains?
archaea, bacteria, eukaryotes
what are the six kingdoms?
plants, animals, protists, fungi, archaebacteria, eubacteria
taxonomy classification and organization
phylum, class, order, family, genus, species
what is a dichotomous key?
a dichotomous key is used to identify unfamiliar organisms
how is a dichotomous key used?
- look at the objects and then separate them using a single distinguishing characteristic
- continue to separate each of the groups until each species has it’s own separate set of characteristics
what are the characteristics of living things?
- movement
- growth and development
- response to stimuli
- reproduction
- use of energy
- cellular structure
lytic cycle steps
- attaches to host
- dna enters
- replicates viral dna followed by making more viral protein
- virus assembles
- release… virus exits the host and dies
lysogenic cycle steps
- attaches.. viral dna enters
- viral dna integrates into host dna
- when cell divides, viral dna is replicated with host dna
what is endosymbiosis?
it is the evolution from prokaryotes to eukaryotes
how is endosymbiosis work?
cells are engulfed but not digested… cells live together in a mutually benefiting relationship
what is the difference between prokaryotes and eukaryotes?
eukaryotic cells are more complex than prokaryotic cells..
what does eukaryotic cells have that prokaryotic cells don’t have?
- membrane bound nucleus and organelles
- many chromosomes that occur in pairs
- protists, fungi, plants and animals are composed of eukaryotic cells
what do both eukaryotic and prokaryotic cells have in common?
they both have ribosomes
what is an antibiotic?
an antibiotic is a type of medicine that can kill off good bacteria
how does antibiotics work?
antibiotics target specific characteristics of bacteria cells. some antibiotics target cell walls of bacteria. they don’t kill human cells because cell membranes have a different composition than human cells
