Natural Selection

Evolution typically happens...

• in a few weeks
• over millions of years
• never
• in 100 years

Bird's beaks evolve mainly due to the type of ___________________ available.

• food
• water
• shrubs
• mates

If an organism can't adapt fast enough, this might happen.

• hibernate
• stay the same
• live longer
• become extinct

Darwin said that the number of offspring an organism has ___________________

• stays the same
• is more than can survive
• is less than needed

Darwin said that within a species there will be _________________________

• nothing different
• variation/differences

Organisms with differences/variations that are helpful will ______________________

• live longer
• become extinct
• show no change

What can happen to a species over time if some of the organisms have an advantage?

• The population will decrease
• The population will become extinct
• The population will slowly increase

Adaptations can be:

• camouflage

• ability to survive cold weather

• hunting skills

• all of the above

A yellow morph and green morph of an insect lives in the rainforest canopy. You would expect:

• the green population to increase and the yellow to decrease

• both populations should stay the same

• both populations will increase

• the green population to decrease and the yellow to increaseThis is a wrong answer

How do you "win" at natural selection?

• survive

• go extinct

• survive & reproduce