POINTS Aliah conducted an experiment to determine respiratory rates during different activities. She counted the number of breaths per minute. Aliah noted that the number of breaths increases as physical activity increases. Why is there an increase in the number of breaths per minute as activity increases?

A) As activity increases, breathing becomes more efficient.

B) As activity increases, the rate of the heart beating increases.

C) As activity increases, the oxygen needs of cells increase.

D) As activity increases, more oxygen is exhaled.

Which experiment would most likely contain experimental bias ?

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return