<u>Answer:</u>
The “wheelchair belt” mechanism is the most important mechanism to have on the wheel chair.
<u>Explanation:</u>
- As the patient have very poor control over his trunk so a belt will be perfect to prevent him from falling out of the wheelchair anytime.
- The other options doesn’t make much of important sense than a belt for the patient with muscular dystrophy needs, especially when lost control over the extremities.
- The wheelchair belt will help him in staying in the wheelchair freely without risk of falling off.
Answer:
G. Decomposing bacteria break down dead organisms and return nutrients to the soil.
Explanation:
Bacteria break down dead matter in the environment, for example, dead leaves, and release carbon dioxide and nutrients in the process. Without the release of carbon dioxide, plants are unable to grow.
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Friction and Tectonic Forces
Some of the first forces that may begin the process of breaking down rock are underground tectonic forces. As the plates of the Earth's crust move against one another, they create friction and pressure, and rocks caught between these plates may fracture and grind themselves into smaller fragments. If any of the broken pieces make their way to the surface, they may experience weathering, the next step in the process of breaking down.
Chemical Weathering
Chemical weathering occurs when a rock encounters a liquid or gas that damages it. For instance, any rock exposed to air undergoes oxidation, in which the oxygen in the air reacts with metallic elements to cause rust. This process gives soil that is rich in iron oxides a reddish color. Similarly, exposure to water can alter certain types of minerals, as with hydrolysis that changes feldspar into clay. Feldspar is the most common mineral found in rock. Dissolved carbon dioxide in rainwater can form carbonic acid, which will break down minerals like calcite -- a calcium-containing mineral found in limestone. These chemical processes can further weaken rocks, making them more susceptible to other forces.
Physical Weathering
Physical forces can also weather rocks. Water that freezes inside the cracks of rock expands, pushing apart the mineral deposits and causing it to fracture. Similarly, the roots of plants can work their way into rocks as they grow, and the pressure caused by their expansion can break apart the rock into smaller pieces. Temperature extremes can cause rocks to expand and contract, increasing the stress on fracture lines and causing them to break apart.
Wind and Water Erosion
Once weathering has damaged rocks and broken them down, the forces of erosion can take over to redistribute the material. Wind and water passing over rocks can pick up small particles, carrying them downstream away from the original deposit. Over time, erosion can turn mountains into hills, carry topsoil into the oceans, and carve channels into solid stone. For instance, scientists believe that one of the primary forces that shaped the Grand Canyon was erosion -- due to the waters of the Colorado River carrying away lightweight soil and limestone from the surface, and the winds blowing dust and smaller particles through the resulting channels.
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~Tomas
Answer:
The hemolytic anemia is a disorder in which the destruction of the RBCs is faster than their production of the RBCs. Hemolysis is the term used for the destruction of the RBCs.
The body of an individual produces antibodies if it senses or there is an antigen that is foreign to the body that helps in the destruction or removal of the particular antigen with the help of antibodies or B cells.
Rh(D) antigen is foreign to the Rh-negative woman as her RBCs surface lack the D antigen so if RBCs expressed to mother blood, IgG production begins and travels to the fetus through the placenta and start destroying RBCs of the fetus. Hemolysis of fetus results in hemolytic anemia and some times death of the baby.
If the solution becomes transparent we could assume that ; The solution was hypotonic and the cells had burst.
<h3>Tonicity of red blood cells </h3>
To test for Tonicity of red blood cells, we placed the cells in a solution.When red blood cells are placed in hypotonic solution there is high rate of osmosis in which the solvent flows into the red cells placed in the solution the cells will experience a process known as Hemolysis and these cells do not diffuse light, the solution becomes a red transparent solution.
Hence we can conclude that If the solution becomes transparent we could assume that ; The solution was hypotonic and the cells had burst.
Learn more about Tonicity of red blood cells : brainly.com/question/6658551