COMPREHENSIVE GUIDE TO THE LS
SERIES: UNDERSTANDING,
COMPARING, AND MASTERING LS1
THROUGH LS3 AND BEYOND
first condition required for natural selection – answer VARIETY -
There must be different characteristics within the population.
(variation)
Ex. A bunny population where some are white furred and some
have no fur
second condition required for natural selection -
answerADVANTAGE - There is an environmental pressure that
gives some of the individuals an advantage or a disadvantage.
third condition required for natural selection -
answerINHERITABLE TRAIT - The advantaged/disadvantaged
characteristics must be able to be passed down from parents to
offspring through genes (inheritable).
fourth condition required for natural selection -
answerREPRODUCE MORE - The individuals with the advantage
reproduce more than the individuals that do not have the
advantage OR the ones with the disadvantage reproduce less
than the ones without the disadvantage.
population - answerall the individuals of a species that live in an
area at the same time
, species - answera group of closely related organisms that can
mate to produce fertile offspring
acquired trait - answera trait that is learned or developed during
an organism's lifetime and is not heritable
inherited trait - answera trait that is coded for in an organism's
DNA; a trait that can be passed down to an organism's offspring
environment - answerphysical, chemical, and biological conditions
acting on an organism
how does life change through time? - answernatural selection - 4
conditions required!
evolution - answera change in a population's gene frequency over
time
natural selection - answerwhen the environment (nature) chooses
(selects) which things survive; organisms that are better suited for
their environment are more likely to survive and reproduce,
passing their genes on to the next generation
how to storyboard natural selection - answer1. Draw 3 boxes for
different generations. 2. Label the generations at the top.
3. Use simple pictures to illustrate the amount of organisms in
each generation. Include a key.
4. Put the environmental pressure on the arrow between the
boxes.
relative age dating - answerputting geologic events in sequential
order based on the types of rock present and their relative
positions
SERIES: UNDERSTANDING,
COMPARING, AND MASTERING LS1
THROUGH LS3 AND BEYOND
first condition required for natural selection – answer VARIETY -
There must be different characteristics within the population.
(variation)
Ex. A bunny population where some are white furred and some
have no fur
second condition required for natural selection -
answerADVANTAGE - There is an environmental pressure that
gives some of the individuals an advantage or a disadvantage.
third condition required for natural selection -
answerINHERITABLE TRAIT - The advantaged/disadvantaged
characteristics must be able to be passed down from parents to
offspring through genes (inheritable).
fourth condition required for natural selection -
answerREPRODUCE MORE - The individuals with the advantage
reproduce more than the individuals that do not have the
advantage OR the ones with the disadvantage reproduce less
than the ones without the disadvantage.
population - answerall the individuals of a species that live in an
area at the same time
, species - answera group of closely related organisms that can
mate to produce fertile offspring
acquired trait - answera trait that is learned or developed during
an organism's lifetime and is not heritable
inherited trait - answera trait that is coded for in an organism's
DNA; a trait that can be passed down to an organism's offspring
environment - answerphysical, chemical, and biological conditions
acting on an organism
how does life change through time? - answernatural selection - 4
conditions required!
evolution - answera change in a population's gene frequency over
time
natural selection - answerwhen the environment (nature) chooses
(selects) which things survive; organisms that are better suited for
their environment are more likely to survive and reproduce,
passing their genes on to the next generation
how to storyboard natural selection - answer1. Draw 3 boxes for
different generations. 2. Label the generations at the top.
3. Use simple pictures to illustrate the amount of organisms in
each generation. Include a key.
4. Put the environmental pressure on the arrow between the
boxes.
relative age dating - answerputting geologic events in sequential
order based on the types of rock present and their relative
positions
