<span>Controlled variable is a variable that was made constant in the research. That was because the controlled variables can influence the dependent or independent variable. If the variables is not made constant, it can alter the research result and made it invalid.
In this case, </span>the caffeine and alcohol intake might alter the physical activity or the blood glucose so it should be controlled.
Answer:
a. Maintenance of axons.
Explanation:
Axons are not maintained by microtubules. Microtubules are used in axons as railways to transport different molecules to the terminal branches of the axon or to the soma of the neuron. Axons are maintained by a special type of cells called Schwann cells.
Without clean water, more than 1a million women lose their lives every year with sanitation-related hookworm, which causes maternal anaemia and preterm births.
<h3>What is the relation between hookworm and anemia?</h3>
In regions where hookworm incidence is greater than 20% and anemia prevalence is larger than 40%, routine preventative chemotherapy for pregnant women after the first trimester is advised, as was already mentioned. In places above and below this guideline threshold, a subset analysis of the effects of maternal hookworm infection on anemia was conducted. Pregnant women with hookworm infection had a higher likelihood of having anemia than pregnant women without hookworm, as would be expected in locations where the prevalence of hookworm is more than 20% P 0.001. Intriguingly, pregnant women with hookworm infection had a higher chance of having anemia with a cOR of 6.07, P 0.001, in regions where the prevalence of hookworm was less than 20%.
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Most hydroelectric power plants have a dam and a reservoir. These structures may obstruct fish migration and affect their populations. Operating a hydroelectric power plant may also change the water temperature and the river's flow. These changes may harm native plants and animals in the river and on land. Reservoirs may cover people's homes, important natural areas, agricultural land, and archaeological sites. So building dams can require relocating people. Methane, a strong greenhouse gas, may also form in some reservoirs and be emitted to the atmosphere. Reservoir construction is "drying up" in the United States Gosh, hydroelectric power sounds great -- so why don't we use it to produce all of our power? Mainly because you need lots of water and a lot of land where you can build a dam and reservoir, which all takes a LOT of money, time, and construction. In fact, most of the good spots to locate hydro plants have already been taken. In the early part of the century hydroelectric plants supplied a bit less than one-half of the nation's power, but the number is down to about 10 percent today. The trend for the future will probably be to build small-scale hydro plants that can generate electricity for a single community. As this chart shows, the construction of surface reservoirs has slowed considerably in recent years. In the middle of the 20th Century, when urbanization was occurring at a rapid rate, many reservoirs were constructed to serve peoples' rising demand for water and power. Since Hydroelectric energy is produced by the force of falling water. The capacity to produce this energy is dependent on both the available flow and the height from which it falls. Building up behind a high dam, water accumulates potential energy. This is transformed into mechanical energy when the water rushes down the sluice and strikes the rotary blades of turbine. The turbine's rotation spins electromagnets which generate current in stationary coils of wire. Finally, the current is put through a transformer where the voltage is increased for long distance transmission over power lines.
Hydroelectric-power production in the United States and the world!
(sorry this is the second part)
Answer:
B. are complicated, larger, and have DNA captured in a membrane-bound structure.
Explanation:
DNA is found in the nucleus of the cell that is membrane bound structure.
