Variation in Populations
What is variation in a population?
Differences among individuals of the same species
How can camouflage help an organism survive?
It helps it avoid predators
Why might white fur be a disadvantage in a dark forest?
It makes animals easier to see
What is an environment?
The surroundings where organisms live
What is natural selection?
The process where organisms with helpful traits survive and reproduce more
What causes variation in populations?
Differences in genes and inherited traits
Why might thicker fur be helpful in cold climates?
It keeps animals warm
What happens if an organism cannot adapt to environmental changes?
It may not survive or reproduce
Name one environmental change that can affect populations.
Climate change, fire, drought, or pollution
Which organisms are more likely to reproduce?
Those best adapted to the environment
True or False: All members of a population are exactly alike.
False
What advantage does a long beak give some birds?
It helps them reach food
Why could bright colors be dangerous for some animals?
Predators may spot them easily
Why might darker fur become more common after a volcanic eruption?
It provides better camouflage on dark ground
How are helpful traits passed on?
Through inherited genes
What is one example of variation in rabbits?
Fur color
How can speed help prey animals survive?
They can escape predators
How can a drought make certain traits disadvantageous?
Some organisms may not tolerate dry conditions
How can food shortages affect survival?
Organisms with helpful traits may survive better
What does survival of the fittest mean?
Organisms best suited to the environment survive
Why is variation important in populations?
It helps populations survive environmental changes
Why are beneficial traits important?
They increase chances of survival and reproduction
What is a disadvantageous trait?
A trait that lowers chances of survival
What happens to populations over many generations in changing environments?
Helpful traits become more common
Why do populations change over generations?
Beneficial traits are inherited more often