Mechanical digestion is the breaking down of food into smaller pieces physically. Mechanical digestion begins in the mouth as the food is chewed.
but in the case of chemical digestion, it breaks the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva.
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Answer:
Advantages: Wind turbines do not actively create green house gases, wind is an indirect solar energy (which means it never runs out), and it has a fairly high net energy
Disadvantages: NIMBY effect (not in my backyard, it means people support it, but they don't want to be near it), transportation and construction of materials cause greenhouse gases, and wind turbines can kill/harm birds and bats
Explanation:
Gathering, constructing and transporting materials to build wind turbines releases green house gases, because of vehicle's combustion and factory emissions. However, wind turbines rely on a renewable resource that a) never runs out, and b) is a clean source of energy. Compared to nonrenewable energy sources, wind is a good energy source.
Answer:
Independent variable
An
independent variable is a condition in a scientific study that is changed or
manipulated to test the effects on the dependent variable. The experimenter
controls the value of independent variable and its value represent inputs or
causes like potential reason for variation.
Additionally, there are
tendencies that independent variables are included in a scientific study especially
if the experimenter has no intention to test their effect directly.
Answer:
a. Has to do with how quickly alcohol enters the bloodstream.
Explanation:
The rate of absorption is the speed at which certain alcohol molecule travels from inside the intestine though the blood circulation. This rate can be modify with other beverages (like oil) that can longer the normal speed or the environmental weather, for example, if it is so sunny, more quantities of drugs will be necessary.