Please answer this: Given the background: Depleted soils can be protected from soil erosion by groundcover plants such as naturally growing grasses in agroforestry systems. These help to stabilise the soil as they increase cover compared to short-cycle cropping systems. Soil cover is a crucial factor in preventing erosion. Cleaner water through reduced nutrient and soil surface runoff can be a further advantage of agroforestry. The runoff can be reduced by decreasing its velocity and increasing infiltration into the soil. Compared to row-cropped fields nutrient uptake can be higher and reduce nutrient loss into streams.Further advantages concerning plant growth: and the situation: Two neighboring farms both had depleted soils due to intensive agricultural practices for decades. Apple far decided to start an agroforestry system and other methods to protect their depleted soils, while Pear farm did nothing and had big losses the following years. Answer the following question: Which farm didn't reduce the runoff?
++++++++
Answer: Pear

Please answer this: Given the background: Predators play an important role in an ecosystem. For example, if they did not exist, then a single species could become dominant over others. Grazers on a grassland keep grass from growing out of control. Predators can be keystone species . These are species that can have a large effect on the balance of organisms in an ecosystem. For example, if all of the wolves are removed from a population, then the population of deer or rabbits may increase. If there are too many deer, then they may decrease the amount of plants or grasses in the ecosystem. Decreased levels of producers may then have a detrimental effect on the whole ecosystem. In this example, the wolves would be a keystone species. and the situation: Mike is studying the predator prey relationship. He is specifically studying three species, species A, species B, and species C. Species A is a predator; species B is the prey; and species C is a plant species that species B lives on. Mike now needs to figure out how the predator prey relationship balance the ecosystem. Answer the following question: If species B population increase, would it affect the ecosystem positively or negatively?
++++++++
Answer: negatively

Please answer this: Given the background: Some fungi take on different shapes, depending on their environmental conditions. These fungi are called dimorphic fungi , because they have "two forms." For example, the fungus Histoplasma capsulatum , which causes the disease histoplasmosis, is thermally dimorphic; it has two forms that are dependent on temperature. In temperatures of about 25C, it grows as a brownish mycelium, and looks like a mass of threads. At body temperature (37C in humans), it grows as single, round yeast cells. and the situation: Two mycologists were studying fungi. Max studied regular fungi, while Red studied dimorphic fungi. They were both fascinated by their findings. Answer the following question: Which person learned less about fungi that take on different shapes?
++++++++
Answer:
Max