Question

review 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.
which best indicates that the primary audience is biology students?
the writer emphasizes the importance of robert tryons work.
the writer specifically mentions that genes influenced the mices ability to navigate the maze.
the writer includes information that only experts would understand.
the writer uses straightforward language to explain an experiment about gene selection.

Explanation:

Biology students are likely to be learning about gene - related concepts. The straightforward language used to explain the gene selection experiment (as in the text) is appropriate for students who are still building their knowledge base. Emphasizing the importance of a work alone doesn't specifically target biology students. Mentioning genes influencing maze - navigating ability is a bit too narrow. And including expert - only information would not be for students.

Answer:

The writer uses straightforward language to explain an experiment about gene selection.