Answer:
Breathing heavily after you have finished running a race is your body way of repaying an oxygen debt.
Explanation:
Any kind of exercise that is performed makes our muscles work harder. As a result, more calories get burned by these muscles. To burn the extra calories, more supply of oxygen is required by the muscles. As you exercise harder, the breathing increases and become heavier to bring more oxygen to the lungs. From the lungs, the oxygen is carried to the muscles which are burning more calories.
You breathe heavily at the end of a race to get enough supply of oxygen.
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❖ B. Punnet Square is a chart used to show the possible outcomes of allele combinations that parents can pass on to their offspring.
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B would be your answer hope this helps :)
Answer:
(A): DNA and protein
(B): The case for proteins appeared stronger until the 1940s, especially since biochemists had identified them as a class of macromolecules with great heterogeneity and function specificity, essential requirements for the hereditary material. Moreover, little was known about nucleic acids, the physical and chemical properties of which seemed far too uniform to account for the multitude of specific hereditary traits of each organism
(C): Virulent strains are pathogenic (causing disease), whereas non-virulent strains are non-pathogenic (harmless) strains.
It is the process of mitosis
