Final Exam Review

Why do peppered moths tend to be the same color as the trees on which they live?

• The coloring goes along with tasting like the tree. 
• It keeps the moth the same temperature as the tree. 
• It makes the moths faster than the birds
• It makes the moths harder to see.

Which of these is an example of natural selection?

• The largest animal in a population will have more opportunities for reproduction.
• Several species of organisms work together so that they all succeed.
• One species takes all the resources in an environment leaving none for others.
• Organism that are best suited to an environment tend to survive and reproduce more often.

A large herd of goats lives in a field full of poison ivy.  Some goats are able to eat the poison ivy while others have become sick when they eat it. Over time the herd as a whole will tend to

• Become more likely to eat poison ivy.
• Become less likely to eat poison ivy.
• Not change in the proportion of goats that can and can not eat poison ivy.
• Eat all the poison ivy and leave only plants all the goats can eat.

Which of these would best form a fossil?

• Muscle
• Bone
• Skin 
• Leaves

Some organisms change to resemble their surroundings even when that environment changes.  They most likely do this to

• be easier to see
• be harder to see
• attract a mate
• to adapt their diet

Evolution works by 

• individuals changing to suit their environment
• Individuals learned new traits and pass them on
• sudden change in the environment cause a species change 
• small changes pass down through many generations

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

Organisms with differences/variations that are helpful will ______________________

• live longer
• become extinct
• show no change