Natural Selection
In order for natural selection to occur, there must be...(Hint: Connects to diversity.)
What is Variation?
The process by which species change over time.
What is evolution?
What are the two main sources of variation?
What is mutations and sexual reproduction?
Shows the evolutionary relationship between species.
What is a Cladogram?
There is fossil evidence of a species at 1 (the bottom) to 4 (the top). Is the third layer younger or older than the second layer?
What is younger?
Organisms that are NOT best suited for an environment have a lower chance of. . .
What is survival?
An organism is first ______ but over time becomes more _____.
(HINT: Think about how single celled organisms became multicelluar.)
What is SIMPLE and COMPLEX?
Change in DNA sequence.
What is mutations?
If a branch is far, it means that the two species/organisms are. . .
What is not closely related?
More complex organisms are. . .
(HINT: age.)
What is younger?
The most 'fit' individuals in an environment are the ones with. . .
What is adaptations?
How does natural selection explain evolution of complex features and organisms?
What is. . .
-by favoring individuals with heritable traits that enhance survival and reproduction in a given environment.
-Mutations.
Where does the change have to occur in order for it to be passed down?
What is gametes?
If a branch is close, this means the two species/organisms are. . .
What is closely related?
Less complex organisms are. . .
(HINT: age.)
What is older?
Natural selection relates to "survival of the fittest" since...(Hint: What is survival of the fittest and how does natural selection work similarly?)
Organisms that are best suited for their environment are able to survive and reproduce?
(HINT: how many cells?)
What is single celled?
In order for natural selection to occur, there must be. . .
What is Variation?
A species from which two species evolve from.
What is a common ancestor?
Body parts with similar structures found in different species.
What is homologous structures?
What happens that allows an organism or species to survive in an environment better? (Hint: What occurs in the genes?)
What is mutations?
Multicellular organisms grew using. . .
(HINT: This should be easy!)
What is evolution?
Without variation, there wouldn't be. . .
What is. . .
-Natural selection
-Genetic diversity
A tuna and sake are close and share a common ancestor. This means. . .
What is closely related?
Fossils which have both the traits of an older group of organisms and a modern-day group of organisms.
What is transitional fossils?