The actual patterns of DNA variation in humans reveal that those from African populations also contain almost all of the common DNA found in other races such as Asians, Europeans, and other novel variants.
African populations were shown to contain alleles (genetic variations) not present in non-African populations but nearly all of the alleles common in non-African populations are present in African populations. Thus, although externally, different races may present various physical characteristics, our genes dictate that we are more similar than we actually think/believe.
Answer:
Respiration begins at the nose or mouth, where oxygenated air is brought in before moving down the pharynx, larynx, and the trachea. The trachea branches into two bronchi, each leading into a lung. Each bronchus divides into smaller bronchi, and again into even smaller tubes called bronchioles.
Answer:
Beta-blockers are medications prescribed by physicians or mostly cardiologists who cater to individuals with heart-related issues. These issues include things that limit the ability of the heart to function properly and they include people suffering from heart attacks, high blood pressure and other illness that requires proper functioning of the heart.
However, Beta-blockers when administered slows the heartbeat per minute thereby reducing the amount of oxygen needed, but due to the way exercise raises the beat of the heart, oxygen pumped to the heart, it requires a well functioning heart to be able to meet up with the demand of the heart required for exercise. So, Beta-blockers already active in the bloodstream would affect cardiac output exposing the heart to further slow down this could result in dizziness has the heart couldn't handle the pressure required to pump more for an exercise.
Answer:
Oak bark is the correct answer.
Answer:
It's drum. Guitar too, I guess.