Question

use the graph below to answer question 12. heart rate of a black bear. 12. the graph shows data collected from studying a black bear. which investigation would provide the best evidence that changes in a bears heart rate are a response to temperature changes and are a mechanism that helps the bear maintain homeostasis? a. measuring the heart rate of another black bear and the average temperatures during the day for a one - month period b. measuring the average temperatures in a polar bears ecosystem in the same seven - month period c. measuring the heart rates of a larger sample size of black bears and the average temperatures during the same seven - month period test continues on answer sheet (all answers - multiple choice and short answer responses must be on answer sheet)

Explanation:

To show heart - rate changes are a response to temperature changes for maintaining homeostasis in black bears, measuring heart rates of a larger sample size of black bears and average temperatures during the same period gives more reliable data. Measuring another single bear (A) or average temperatures in a polar bear's ecosystem (B) is not as relevant.

Answer:

C. measuring the heart rates of a larger sample size of black bears and the average temperatures during the same seven - month period