Adaptations and Evolution

Adaptations in a species occur because

• something in their environment changes

• the organism wants to change

• the parents know what is best for their offspring

• resources are plentiful

Which of these would be a physical adaptation?

• White fur in a snowy climate

• Migrating to warmer places for the winter

• Hunting as a pack

• Learning to build a nest

A change in a gene caused by a mistake or the environment is called a

• genome

• mutation

• correction

• anomaly

True or False: Adaptations are always harmful to an organism.

• True

• False

Which scientist is responsible for the theory of natural selection?

• Charles Darwin

• Frances Crick

• Jane Goodall

• Gregor Mendel

Natural selection occurs when

• organisms within a species compete for resources

• organisms within a species have plenty of resources

• organisms in a species decide it would be good to change

• people change an organism to better suit their needs

Organisms better adapted to their environment survive to pass their genes to their offspring

• Natural selection

• Selective breeding

• Power of chance

• Probability of survival

Survival of the fittest means

• Organisms that live long enough to reproduce pass on their genes

• The strongest organisms get the most food

• The organisms that live the longest are the most fit

• All offspring that are born survive

True or False: We call evolution a theory because it is just a guess.

• True

• False

Which of these is evidence for evolution?

• the fossil record

• organisms that appear different may have similar internal organs

• embryos of different organisms can look similar

• all of these