Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
organism
|
a life form-a living entity made up of one or more cells
|
|
theory
|
a explanation for a very general class of phenomena or observations
|
|
cell
|
a highly organized compartment that is bound by a thin, flexible structure called a plasma membrane and that contains concentrated chemicals in an aqueous (watery) solution
|
|
cell theory
|
all organisms are made up of cells, and all cells come from preexisting cells
|
|
hypothesis
|
a proposed explanation
|
|
prediction
|
something that can be measured and that must be correct if a hypothesis is valid
|
|
evolution
|
a change in characteristics of a population over time
|
|
natural selection
|
explains how evolution occurs
1. individuals within a pop. vary in characteristics that are heritable 2. these heritable traits help individuals survive better and reproduce more offspring |
|
heritable
|
traits that can be passed on to offspring
|
|
population
|
a group of individuals of the same species living in the same area at the same time
|
|
artificial selection
|
changes in population that occur when humans select certain individuals to produces the most offspring
|
|
fitness
|
the ability of an individual to produce offspring
|
|
adaptation
|
a trait that increases the fitness of an individual in a particular environment
|
|
speciation
|
natural selection has caused populations of one species to diverge and form new species
|
|
tree of life
|
a family tree of organisms
|
|
phylogeny
|
an organisms actual genealogical relationships(tribe-source)
|
|
eukaryotes
|
cells that are multicellular and have a nucleus at the center
|
|
prokaryotes
|
cells that are unicellular and have no nucleus
|
|
taxonomy
|
the effort to name and classify organisms
|
|
domain
|
taxonomic category
|
|
phylum
|
refers to major lineages within each domain
|
|
genus
|
first part of organisms scientific name; made up of a closely related group of species
|
|
Scientific(latin) name
|
organism's genus and species designation
|
|
null hypothesis
|
specifies what we should observe when the hypothesis being tested isn't correct
|
|
control group
|
a group of organisms or samples that do not receive the experimental treatment but are otherwise identical to the group that does
|