Question

use the table below to answer the question.
a student wants to conduct an investigation to provide evidence that the human body has a feedback mechanism for homeostasis during exercise. the student designs an investigation and collects the data shown in the table.
which revision to the investigation design would result in data that is more accurate?
changing the time intervals of measurement so that they are equal and collecting breathing rate data
repeating the procedure with the same person on another day and collecting medium sweat level data
adding an additional measurement 20 minutes before exercising and collecting data on weather conditions
including a second person who will perform a different exercise and collecting data on the age of each person

Explanation:

To get more accurate data for an investigation on the body's feedback mechanism during exercise, having equal - time intervals for measurement helps in consistent data collection. Also, collecting breathing rate data provides more comprehensive information about the body's response during exercise. Other options like collecting medium sweat level data on another day (option b) doesn't address the accuracy of the overall data collection method, adding a measurement 20 minutes before exercise and weather data (option c) is not directly relevant to the accuracy of the exercise - related data, and including a second person with a different exercise and age data (option d) complicates the investigation without improving the accuracy of the data for the original purpose.

Answer:

A. changing the time intervals of measurement so that they are equal and collecting breathing rate data