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Plants that get nutrients from rocks will can cause chemical weathering. Generally there are two types of weathering processes: physical and chemical weathering and they result in the breakdown of rocks, minerals, etc. Plants contribute to both physical and chemical weathering. Plants that grow in fissures and cracks in the rocks, as they grow their roots extend. Over time, the rocks will be broken into smaller fragments. Many such plants also give off chemicals, most commonly humic acid. These acids help in the breakdown of iron and aluminum compounds in the subsurface. Plants also support microbial life forms that help in weathering of soil and minerals. All these process contribute to the weathering of rocks and minerals.
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According to me, no animal would be able to survive in a condition where the sunlight is blocked. As the sunlight is blocked, plants will not be able to make their food as they need sunlight for the process of photosynthesis. As the plants will not get enough nutrition due lack of food, they would eventually die. By this, the herbivorous animals which feed on plants, would not get their food . Also, the the carnivorous animals which depend on the herbivorous animals for food, would not be able to satisfy their hunger as the animals they feed on would be weak or maybe even dead.
The southern economy depended heavily on slave labor. This was the main reason that there were 20 times as many enslaved African Americans in the South as in the North by 1800. They were not treated as equals within the movement. Both had faced discrimination while fighting for justice.
Answer: Institutional Review Boards are charged with protecting the rights and welfare of human subjects recruited to participate in research activities conducted under the auspices of the institution to which the IRB is affiliated.
