Vocabulary
"a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group"
what is a species?
This introduces new variation to population.
What is a mutation?
This is something that can cause populations to change over time.
What is a change environment?
What can cause populations to completely die off?
Human induced climate change, meteor impacts, gradual climate change due to natural changes.
What do taller histogram bars indicate?
What is a great number of individuals with those traits.
"a trait that makes it less likely that an individual will survive in a specific environment"
what is a non-adaptive trait?
The vast majority of mutations do this.
What is nothing?
This is what makes a member of a species unique.
What is a trait?
This process explains how traits become more common over time.
Natural Selection
What does a greater number of histogram bars indicate?
What is a greater amount of variation for that feature.
True or False: Natural selection gives organisms the traits they need to survive.
FALSE: (traits already exist—selection acts on them)
If a mutation results in an adaptive trait, we can expect it to do this over many generations.
What is becomes more common?
What will become more common in populations over time?
What is an adaptive trait?
Changing the DNA of an organism to save a problem.
What is Genetic Engineering?
What can histograms tell us?
What is the amount of variation of a specific trait in a population.
"any difference in traits between individual organisms"
what is variation?
Remember, (Variation means the differences in traits among individuals in the same species.)
Example (Some trees are taller, some trees are shorter)
A trait is non-adaptive if it does this.
What "keeps the organism from surviving and/or reproducing?"
What can cause individuals to die out without having offspring?
What is a non-adaptive trait?
True or false:
Humans had nothing to do with the Cane Toad population boom in Australia.
What is FALSE. Humans introduced the species in Australia changing the environment, which greatly impacted other species there.
Why do we compare histograms from different generations?
What is to see how the variation within a population has changed over time.
"the number of individuals with each trait in a population"
what is distribution?
Occasionally an individual introduces a new trait to a population through a mutation. This can only happen if...?
What is the mutation is an adaptive trait?
Where do offspring inherit traits from?
What is from their parents?
What human activities caused human-induced climate change?
population, combustion, increase of livestock, cutting down forests
How do we use histograms to predict future generations?
What is by labeling the likely to survive and not likely to survive based on the environment and variation of the trait?