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 uses straightforward language to explain an experiment about gene selection.

the writer specifically mentions that genes influenced the mices ability to navigate the maze.

the writer includes information that only experts would understand.

Explanation:

To determine the primary audience is biology students, we analyze each option:

• Option 1: Emphasizing Tryon’s work doesn’t relate to the audience being biology students specifically.
• Option 2: Biology students study genetics and related experiments. Using straightforward language to explain a gene - selection experiment (relating to biological concepts like genetics) is suitable for biology students, as it presents a biological experiment (on gene influence via selective breeding) in an accessible way for learners in the field.
• Option 3: Just stating genes influence maze navigation is a conclusion, not an indicator of the audience being biology students (other fields could discuss this too).
• Option 4: Information only experts understand would not be for students (who are still learning), so this is incorrect.

Answer:

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