<span>Answer: occurs when the aortic and pulmonary valves backfill with blood</span>
The second heart sound,that is heard in normal hearts, is generated by the closing of the semilunar valves((the aortic valve and pulmonary valve). Before that, the first sound corresponds to the closing of the atrioventricular valves.
The temperature is dropping one degrees every minute
Answer:
Your answer would be D. 60 percent.
A cultivated field with organic methods would expect to see greater diversity.
What Is Organic Farming?
Organic farming is an agricultural practice that makes use of biological pesticides and fertilizers derived from plant or animal waste. Actually, the practice of organic farming began as a response to the harm that synthetic fertilizers and chemical pesticides were causing to the environment. Or to put it another way, organic farming is a new type of agriculture or farming that improves, maintains, and repairs the ecological equilibrium.
Economical benefits of organic farming include: For the planting of crops, expensive fertilizers, insecticides, or HYV seeds are not necessary in organic farming. There is therefore no additional cost.
Learn more about Organic Farming here:
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Hulk syndrome, when you get mad and turn green
