Question

read the science textbook excerpt and then answer the question.
genes and behavior
in the 1940s, behavioral psychologist robert tryon conducted an experiment in which rats were placed in a complex maze that had a food reward at one exit. rats that made fewer errors navigating the maze were bred together to create a \maze - bright colony.\ rats that made more errors were bred together to create a \maze - dull colony.\ after selectively breeding the mice for seven generations, tryon tested offspring from each colony to determine how quickly those rats would learn the maze. offspring of the maze - bright rats consistently made fewer errors than the maze - dull offspring. tyrons research therefore suggests that the ability to navigate the maze successfully was influenced by genes passed from parent to offspring.
who is the primary audience?
biology students
genetics researchers
professional psychologists
people who own pet rats

Explanation:

The excerpt is from a science textbook, discussing a scientific experiment related to genes and behavior (a topic in biology). Textbook excerpts like this are typically designed to educate students studying the subject, so biology students are the primary audience. Genetics researchers would likely seek more advanced research, professional psychologists focus on human/animal behavior in a different context, and people with pet rats don't need textbook - level science on gene - behavior in rats for pet care.

Answer:

biology students