Natural selection
what is natural selection?
the process in which organisms that are best suited for their environment survive
what do mutations cause
random changes in DNA
what does natural selection NEED to require for it to occur
variation
what is a cladogram
a graph that shows the evolutionary relationship between two organisms
what are fossils
what is competition ?
when there is a struggle for survival within a population for organisms to survive
if a organism is less complex what does that make it ?
older
where does mutation occur
in the gamets
true or false :
far branches = closely related
false
what are two different types of fossils ?
body and trace fossils
what happens to organisms that aren't able to meet the expectations of their environment
they die off
if a organism is more complex what does that make it
younger
the two main sources of variation
mutation & sexual reproduction
what are cladograms also known as
evolutionary pr phylogenetic trees
why are fossils important
Fossils provide evidence of evolutionary changes over time, showing how species have adapted and diversified.
what is overproduction?
when most populations have more off springs that can survive
what is evolution ?
the process by which organisms die over time
true or false :
mutations that occur in the gamets can be passed down to a offspring
true
what do the branches represent ?
descendates of the common ancestor
what is a very popular fossil
dinosaur fossils
what is variation ?
a genetic difference
what happens when organisms are no longer suited for their environment
they go extinct
what occurs in miosis
a recombination of genes occurs that allows for new arangements of genes
what is a descendent
organisms that developed from another thing that existed earlier
how do fossils relate to Transitional Forms
Fossils can show intermediate forms between different species, providing evidence of evolutionary transitions.