While listening to someone’s heart, a doctor discovers that the “lub” sound is weaker than the “dubb” sound. what might this clue suggest about the functioning of the heart valves?

This clue suggests that the heart valves functions to prevent the backward flow of blood.

Explanation:

The "lubb" sound is produced when the atrioventricular valves in the heart close. These valves are deep inside the heart and are between the upper (atrial) and lower (ventricular) chambers. The "dupp" sound is produced when the semilunar valves (aortic and pulmonary) close. The valves close to prevent backflow from the blood ejected from the ventricles

it enhances antibody production by t cells of the adaptive immune system.

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explanation:

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

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