Question

URGENT!!!!!!!!

Bird guides once listed the myrtle warbler and Audubon's warbler as
distinct species that lived side by side in parts of their ranges.
However, recent books show them as eastern and western forms of a
single species, the yellow-rumped warbler. Apparently, the myrtle
warbler and Audubon's warbler ____

Select one:

are merging to form a single species

are almost identical in appearance

successfully interbreed and produce fertile offspring

live in different places

Answer 1

c. successfully interbreed and produce fertile offspring.

Step-by-step explanation:

I selected with option c because it accurately illustrates how the myrtle warbler and the Audubon's warbler were combined to become the single species known as the yellow-rumped warbler. They are not separate species, but rather diverse varieties of the same species because they successfully interbreed and produce fruitful offspring. This is frequently used as a standard to identify the species of two birds.