The one-toed horse of today steadily evolved from its five-toed ancestor. which theory of evolution can explain this example?
a: adaptive radiation
b: punctuated equilibruim
c: gradulism

Gradualism describes the rates of speciation. It means that evolutionary changes in species are slow, gradual and continuous process. In our example, The one-toed horse of today steadily evolved from its five-toed ancestor. Steadily is the key word. So, the change was slow and continuous process.

If the change were rapid, this would be an example of punctuated equilibrium.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs