The
correct answer is no.
<span>The
development of retinoblastoma occurs as a consequence of mutation of genes RB1
or MYCN. Those mutations occur in the early stages of fetal development and affect
the way in which cells grow and develop within the body. The more common is the
defective RB1 gene that can be inherited from either parent. The expression of
the RB1 allele is autosomal dominant.</span>
The core would be the pit, or seed of the plumb because it is at the very center.
Answer:1 is that they modify Earth’s surface.
2 is that Both statements 1 and 2 are true.
3 is They cause small waves in the open ocean, but large ones near the shore.
4 is earthquakes: open up large cracks in Earth’s crust
tsunamis: erosion of beaches
Explanation:
Answer:
The human heart has four chambers. The right and left ventricles are the lower two chambers, and the right and left atria are the top two chambers. These four chambers are all connected by valves that control the flow of blood between them. The chambers and valves of the heart and all of the human body’s arteries and veins make up the human cardiovascular system.
Explanation: The right ventricle functions to perform two jobs. It receives from the right atrium blood that has had its oxygen removed by the body. The ventricle then pumps that blood into the pulmonary artery so it can be moved to the lungs.
The pumping that occurs in the ventricles requires more force than the pumping of the atria. This is because the blood travels outside the heart when leaving the ventricles. The aorta, on the other hand, pumps blood to a neighboring chamber. The ventricle’s need to pump the blood farther requires that the walls of the ventricles be thicker than the aorta walls.The heart is made of chambers that both hold and move blood, so there is a system of valves that prevents blood from moving in the wrong direction. Between the right atrium and the right ventricle is the tricuspid valve. The pulmonary valve is between the right ventricle and the pulmonary artery. These two valves keep the flow of blood going in one direction.The system moves blood in two parts. Contraction of the right atrium moves blood into the right ventricle via the tricuspid valve. The pulmonary valve is then closed and the right ventricle fills with blood.After the blood from the right atrium has moved into the right ventricle, the tricuspid valve closes so the blood does not flow backward. The right ventricle contracts and causes the pulmonary valve to open. The blood then moves freely to the lungs without possible backflow because the pulmonary valve closes after the ventricle has contracted completely.In some people, the ventricles can become enlarged, or dilated. Right ventricle dilation is rarer than left ventricle dilation. In either case, the size increase is generally a response by the heart to heal damage by thinning and stretching the muscle. If the heart has been damaged by previous heart attacks, alcohol abuse, exposure to heavy metals, or other harm, then there is a risk of ventricular dilation.
The movement of phosphorus from the environment to oraganism and back is called the Phosphorus cycle.
The repeated movement of a specific nutrient or element through one or more organisms and back to the environment is known as a "nutrient cycle."
Phosphorus is a crucial component for all living things. It contributes significantly to DNA and RNA's structural foundation.
They are a crucial part of ATP as well.
Phosphorus makes up 80% of the bones and teeth in humans.
The phosphorus cycle progresses very slowly. The phosphorus in the rocks is washed into the soil by a number of weather-related processes. The organic matter in the soil, which is used for numerous biological activities, absorbs phosphorus.
Since phosphorus and compounds containing phosphorus are only found on land, the atmosphere has little impact on the phosphorus cycle.
Following are the important steps of phosphorus cycle:
1.Weathering
2.Absorption by Plants
3.Absorption by Animals
4.Return to the Environment through Decomposition
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