EVOLUTION
EVOLUTION OF A POPULATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Long, strong running legs
|
|
|
Claws with a powerful grip
|
|
|
camouflage
|
|
|
A defective heart valve
|
Detailed explanation-1: -Detailed Solution. The correct answer is option 3, i.e. Septum. The heart has four valves-one for each chamber of the heart.
Detailed explanation-2: -Valvular heart disease is when any valve in the heart has damage or is diseased. There are several causes of valve disease. The normal heart has four chambers (right and left atria, and right and left ventricles) and four valves (Figure 1).
Detailed explanation-3: -Common heart valve disease causes include: Rheumatic fever from strep throat that wasn’t treated. Heart attack that damages your heart. High blood pressure (advanced).
Detailed explanation-4: -If the valve becomes narrowed, it is harder for the blood to flow through, and often the blood leaks backward. Symptoms usually don’t until the adult years. With this defect, the mitral valve leaflets bulge and don’t close properly during the contraction of the heart. This lets blood to leak backward.