All about genetic variation
Genetic variation can come from ________ or __________.
mutations or sexual reproduction
The trait that helps an organism survive and reproduce in its environment is called this.
adaptation
____________ is a selection pressure that made it harder for hawksbeard with feathery seeds to survive and reproduce.
If climate change makes an environment hotter, which trait (thick fur or thin fur) may be selected for, and why?
thin fur, because it helps with heat tolerance
During meiosis _________ produces new combinations of alleles on chromosomes.
crossing over
When organisms with traits better suited for their environment survive and reproduce more successfully.
A gene is expressed through what process?
The scientist known as the “Father of Evolution.”
Charles Darwin
A mutation in the DNA happens during the _________ of the cell cycle.
S phase
Things in an environment that makes it harder or easier for some individuals in a population to reproduce.
selection pressure
The Common Garden Experiment helped us learn that boldness in Juncos is ___________.
inherited
A student says organisms evolve traits because they “need” them. Why is this incorrect?
Traits appear randomly and natural selection favors the helpful ones.
Genetic variations can either be _________, __________, or ___________.
anatomical, physiological or behavioral
Boldness is considered to be a _________ _________ that makes it more likely for them to survive and reproduce.
behavioral adaptation
CORT is a ________ that measures the stress levels in birds and other animals.
hormone
Students use generational models to see how advantageous traits become more common. This change in trait frequencies is called…
evolution
____________ is happening during the S phase of the cell cycle.
DNA replication
Producing non feathery seeds was a __________ __________ that helped hawksbeard survive and reproduce more.
anatomical adaptation
Evolution does not happen through individuals but through ___________.
Bacteria that survive an antibiotic and reproduce show this process happening today.
antibiotic resistance