Multiple choice

The correct sequence of animals that are arranged in increasing rate of heart beat is

  1. Sparrow - Cat - Horse - Whale

  2. Whale - Horse - Cat - Sparrow

  3. Whale - Sparrow - Cat - Horse

  4. Whale - Sparrow - Horse - Cat

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lower the size, slower the heart rate. This is because the heart has to handle large volume of blood flowing through the same narrow terminal capillaries.