the heart has valves in place to prevent the backflow of blood.
True
Fossil fuels like coal and petroleum takes millions of years to form. The rate of usage of fossils is not equal to its formation. As the rate of formation is slow it is important to use energy in an efficient way so that it is not consumed in a wrong way. The transformation of energy should be more efficient to avoid the wastage of energy. By doing this we can decrease the consumption of fossil fuels as it cause pollution in the environment. The burning of fossil fuel releases carbon dioxide, nitrogen oxide ,and other harmful gases which is injurious to the health of people. So, the fossil fuel should be used in a decreased manner.
You can infer that the birds once had a common ancestor but became separated. Mutations in copying their genes stacked and caused changes in the beaks so the birds could be more well off or better adapted in their new environment.
A pediatric genetesist uses pedigrees to predict future offspring using family line.
The answer is semi fowler. The semi fowler position is the position of a patient who is lying in bed in a recumbent position with the head of the bed at about 30 to 45 degrees. The situation is used in the course of labor more frequently than the fowler position.
