Common Ancestry and Natural Selection Flashcards
Life on earth do NOT share a common ancestor.
False; they do
How long ago did modern humans arise?
300,000 years ago
Who was Charles Darwin?
English Naturalist
Charles Darwin proposed what?
Proposed the idea of evolution by natural selection
POpulations and species change overtime. They ________.
Evolve
Heritable traits that help organisms survive and reproduce become more __________ in a population over ____.
Common; time
Natural selection is based on what key observations?
- Traits are often heritable
- More offspring are produced than can survive
- Offspring vary in their heritable traits
In living organisms, many characteristics are ______, or _____ from parent to offspring.
Inherited; passed
The offspring in any generation will be slightly different from one another in their traits and many of these features will be heritable.
True
Organisms are capable of producing more offspring than their _________________ can support.
Environment
What can help increase an organism’s chances of survival and reproduction?
Some heritable traits
Is there competition for limited resources in EACH generation?
Yes
The individuals with the helpful traits will leave more offspring in the next generation than their peers. True or False?
True
The helpful traits will NOT be common in the next generation. True or False?
False; the helpful traits will be MORE common in the next generation.
