Natural Selection

Organisms with differences/variations that are helpful will ______________________

• live longer
• become extinct
• show no change

Which is not an example of an adaptation?

• A bird's beak allows it to crack open hard nuts.
• A zebra's stripes allow it to confuse its predators.
• A frog's large hind legs allow it to jump from danger.
• A cat sleeps on the sofa to avoid the vacuum cleaner.

Which of the following is a term for a group of similar organisms that can reproduce fertile offspring?

• individual
• population
• species
• fossil

What is it called when better adapted organisms survive to pass traits along to their offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

"Survival of the Fittest" describes which theory

• a) natural selection
• b) gravity
• c) heredity
• d) string theory

Which organisms are most likely to survive?

• the best adapted
• the fastest
• the strongest
• the most domesticated (tamed)

Any inherited trait that gives an organism an advantage in its environment is called ___.

• a mutation
• an adaptation
• evolution
• natural selection

When every organism of a given species has died

• Natural Selection
• Homeostasis
• Extinction
• Selective Breeding

Natural selection is where ___________ decides which traits should be passed on

• Nature
• A human
• Mr. Holt
• The illuminati

Mutations are a change in what?

• DNA
• tRNA
• genotype
• phenotype