Two populations of black-tailed rats became separated from each other by the formation of large canyon, thus preventing their interbreeding. the condition described is

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."