SAT® Reading and Writing

Free Version

Upgrade subject to access all content


Vocabulary Definition 3


A Dog's Eye View of Morphological Diversity, Liza Gross

Gross, Liza. "A Dog's Eye View of Morphological Diversity." PLOS Biology (2010): n. pag. Web. 20 Mar. 2016.

"Such variations, where one dog may have an A and another a T, promise to reveal the genetic roots of morphology, behavior, and disease." (Lines 38-40)

In this sentence, what is the meaning of morphology?


The form and structure of organisms and their specific structural features.


The changing characteristics of organisms as they grow and mature.


The change in certain characteristics as one species joins with another.


The growth and development of a species over time as it adapts to its environment.