Answer:
The xylem consists of tracheary elements, xylem parenchyma cells, and xylem fiber cells.
Answer:
1. when there is cardiovascular disease.
2. High blood pressure increases the likelihood of suffering a stroke, a heart attack, heart failure, kidney disease or premature death.
3. The mitral valve opens.
Explanation:
1. High blood pressure is a common condition in which the force exerted by blood against the walls of the arteries over the course of time is high enough to cause you health problems such as heart disease. After the first rise of pressure caused cardiac ejection volume, one notch occurs with a second ascent product of the reflection of the pulse wave. In younger individuals, with elastic arteries, said wave occurs in diastole, so does not influence the peak systolic pressure. By contrast, with advancing age and the stiffness of large vessels, the reflected wave is transmitted prior to the aorta (systole) so as to increase the peak central PAS.
2. The pressure increases progressively the pressure of the blood flowing through the arteries. As a result, you can submit the following: Arteries damaged and narrowed. High blood pressure can damage the cells of the inner lining of the arteries.
3. When the pressure in the left ventricle falls below the pressure of the left atrium, the mitral valve opens, and the left ventricle fills with blood that had been accumulating in the left atrium.
A bacterial promoter sequence must be included. The coding exons control the actual production of the protein that the gene codes for; meanwhile, the promoter sequence serves to initiate transcription of the specific genes. Promoters are included upstream of the DNA molecule at the start site of the gene.
Primary consumers<span> only obtain a fraction of the total solar energy—about 10%—captured by the producers they eat. The other 90% is used by the producer for growth, reproduction, and survival, or it is lost as </span>heat<span>. You can probably see where this is going. Primary consumers are eaten by </span>secondary consumers<span>. An example would be birds that eat bugs that eat leaves. </span>Secondary consumers<span> are eaten by </span>tertiary consumers<span>. Cats that eat birds that eat bugs that eat leaves, for instance.</span>
Its natural selection. Due to genetic variations, some animals have traits more desirable then others. This animals will survive and reproduce better, over time creating a whole new species.
