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?
genetics researchers
people who own pet rats
biology students
professional psychologists

Explanation:

The text is from a science textbook excerpt. Textbook excerpts are typically designed to educate students. The content is about a biological experiment (rats in a maze, genetics - related concept of inheritance). Biology students are the ones who study such scientific experiments and concepts as part of their curriculum. Genetic researchers would likely get more in - depth and specialized research papers, not a textbook - style excerpt. People who own pet rats would not be the target as the content is scientific and educational. Professional psychologists might study more complex psychological theories rather than a basic biological experiment presented in a textbook - like manner.

Answer:

biology students