Science Assessment

CA033003

The DNA sequence of similar genes in different organisms can differ at certain locations because of mutations that occur in those genes.

31%

EN023001

When a new predator is introduced into a population of lizards, the lizards with the traits that help them avoid the predator are more likely to survive and reproduce than the others.

47%

EN028003

If only large seeds are available, only the birds with large enough beaks will get enough food to survive and reproduce, and they will pass the trait of large beaks to the next generation.

0%

EN021004

When a change occurs in the environment, the individual organisms that have traits that are better suited for the changed environment would be more likely to survive and reproduce.

44%

EN034003

Some organisms survive and others die as the environment changes; this changes the proportion of organisms with certain traits in that population.

34%

EM055003

Environmental changes can lead to the increase of individuals of the same species with certain alleles and the decrease of others (cod fish that have an allele that gives them resistance to a toxin).

33%

EN030004

Bacteria become resistant to antibiotics when a few individual resistant bacteria survive and reproduce, passing their resistance on to the next generation.

30%

EM036003

In natural selection, some individuals of the same species have heritable traits that increase in frequency over many generations because they contribute more offspring to the next generation having that trait.

22%

EN088004

Environmental change can lead to changes in which traits give organisms a survival advantage (anoles).

19%

EN022004

If the type of seed available to a population of birds changes, the individual birds with the beak best equipped for eating the new type of seed are more likely to survive and reproduce than the others.

0%