<span>The answer to this question would be: keep blood moving forward through the heart
When the ventricle contracts, the valve will plug the hole to atrium so the blood will be pump to the body. The valve in heart will prevent backflow of blood from ventricle to atrium which makes the blood keep moving forward.
A defect in valve could reduce heart deficiency as a part of the blood might be going back to the atrium, called regurgitation.</span>
The answer is yes. Resistance measurement is used when you switch your multimeter into resistance mode and it is also measured in ohms. It is important to place at the right polarity of the multimeter in order to get the right measurement of your electronic device.
The potential energy in food is what we call a Calorie, which (note the capitalization) is actually a kiloCalorie (1000 calories). Just pick any food high in calories; fats and oils are very calorie dense.
Answer: The answer is B
Explanation: This is because if there i low depths for plants, and the herbivore then the carnivores can not eat.