Answer:
Topsoil, which lies closest to the surface of the land, contains essential nutrients for crops. It is this layer of soil that is endangered by wind and water erosion. Soil erosion decreases soil fertility, which can negatively affect crop yields. Once soil erosion occurs, it is more likely to happen again.
Mulching.
Planting a cover crop – such as winter rye in vegetable gardens. ...
Placing crushed stone, wood chips, and other similar materials in heavily used areas where vegetation is hard to establish and maintain.
Maintaining a healthy, perennial plant cover.
Explanation:
Pelicans and humans have complex heart because there is need
for them to deliver more oxygen per liter blood to the body. Also, there heart is made up of four chamber and they have high
metabolic rate which necessitate them to supply efficient blood throughout the body.
30-100 different molecule types
A snowy enviroment. such as a snow fox with white fur surviving better than a snow fox with brown fur. thus white fur fox decrease genetic diversity because it is more sucessful at surviving and reproducing than the brown fur fox
La hebra complementaria debe tener 5 millones de nucleótidos, porque cada nucleótido tiene una base nitrogenada, y la hebra complementaria debe tener la misma cantidad de bases nitrogenadas que la hebra original. (Recuerda que las dos hebras "encajan" una con otra).
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