<span>The order of impulse conduction in the heart, from beginning to end, is </span><span>SA node, AV node, bundle of His, bundle branches, and Purkinje fibers.
SA node, or the sinus node, is the heart's natural pacemaker. AV node, or the atrioventricular node, spreads electrical impulses from the atria to the ventricles. The bundle of His, as well as bundle branches, are a part of the electrical conduction system of the heart. Purkinje fibers send nerve impulses through the heart.
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Answer:
B. Biological Evolution
Explanation:
The biological evolution or evolution is a process by which organisms changes over time and the heritable traits are passed on to the successive generations.
The traits which increase the survival rate or reproductive fitness become permanent in the population when they are passed on to the generations.
In the given question, all the organisms possess DNA, use energy and perform metabolic functions is the result of the transfer of the traits as these characteristic feature allows the cells to survive and thus allows the organism to survive in the different conditions.
Thus, Option-B is the correct answer.
It can cause deformations or second hand smoking to the baby which may cause cancer later on in life. <span />
Answer:
Force applied on the ball when it is kicked, gravitation pull and frictional force
Explanation:
When the ball is kicked it starts accelerating, the moment when it leaves the foot acceleration starts decreasing. Here two more forces start acting on it, one is friction force caused by wind and second is tradition pull of the earth. Both these forces slow down the motion of a soccer ball and it slows down and stops.