Answer:
I think is D because I had this question
Answer:
When something goes wrong with the sinoatrial node, you may develop a consistently slow heartbeat (sinus bradycardia) or the normal pacemaker activity may stop entirely (sinus arrest). If sinus arrest occurs, usually another area of the heart takes over pacemaker activity. This area is called an escape pacemaker.
Explanation:
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Answer:
D. .................................
The answer would be B:The data suggests that exercise increases the rate of cellular respiration because more carbon dioxide was produced.
The data has a consistently show that the time needed to change BTB color in after exercise group is much shorter(less than half) compared to before exercise group. If the time needed longer, this show that the amount carbon dioxide removed from the lungs is much higher. The reaction that provide energy for the muscle will produce carbon dioxide as side product in cellular respiration.
Answer:
The answer would be C. mouse.
Explanation:
This is because it has more than one cell. A. Bacterium is unicellular, along with an amoeba and paramecium because they are basic units of life, with only a single cell.
