how many species live in planet Earth?
unknown-roughly 3 to 5 million
why is life so incredibly diverse, yet so strangely similar?
organisms can contain similar features. planes have wings, birds have wings-this
feature is useful for different things (different for penguins, pelicans, bats, eagles)
true or false: biodiversity on earth will likely decrease in the near future?
true or false: scientists believe in evolution even though they currently lack
evidence for the theory
false
true or false: opposition to irrational numbers was based on evidence that such
numbers cannot exist
false
true or false: opposition to irrational numbers stemmed from a worldview
involving naturalistic evolution
false
true or false: the belief that irrational numbers cannot exist reflects religion more
than science
true
true or false: modern mathematicians accept irrational numbers because such
numbers provide more accurate solutions to problems than whole numbers do
true
the scientific method relies on....
models, observations, and experiments
a model is a formal description of a scientific hypothesis. which provides the
most precise description of a hypothesis?
true or false: an experiment enables one to demonstrate that a correlation
between two variables results from cause and effect
true
a well designed experiment...
controls for environmental and genetic factors, involves replications of experimental
subjects, and randomizes experimental subject among treatments
true or false: unlike Wallace, Darwin did not believe that natural selection
required variation among individuals
false
true or false: Wallace used induction to develop a model of evolution by natural
selection
true
unlike Wallace, Darwin's conceived his theory of evolution without observing
species living on islands
false
true or false: both Darwin and Wallace must have assumed that differences
among individuals were passed onto their offspring
true