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Answer:</u></h2>
<u><em>The nucleus has three major functions: </em></u>
- Store the inherited material of the cell (DNA)
- Coordinates the activity of the cells ( i.e. growth, intermediate metabolism, protein synthesis and cell division/ reproduction).
- It maintains gene safety and monitors the functions of the whole cell through the regulation of genetic expression.
The work of Rachel Carson and the other ecologists has revealed the terrible consequences of the overuse of DDT. These ecologists worked at the ecosystem level of environmental interaction because they studied the depth of relationships between organisms and their environment.
An ecologist studies environmental problems and determines what causes them and how to improve the situations. In research, they gather data and analyze that for importance. Although, DDT (Dichloro Diphenyl Trichloroethane) was developed or invented as the first of the modern synthetic insecticides in 1940.
Hence, Rachel Carson and other ecologists found that overuse of DDT causes harm to the human liver and reproduction. As a result, humans face symptoms like vomiting, tremors, or shakiness. These problems were affecting the ecology and causing environmental disbalance. So those ecologists were working on the ecosystem level to solve the problem.
Learn more about DDT here
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B.) crossing over, this is when chromosomes exchange DNA
Answer:They conserve natural resources and help reduce the amount of trash and waste become more reusable.
Explanation:Hope this helps;) !!!
Im pretty sure they are secondary consumers, since the main ones are the predators and omnivores.
