Commercial logging destroyed 45 percent of old-growth forests.
Logging, or commercial logging, involves cutting trees for sale as timber or pulp. The timber is used to build homes, furniture, etc. and the pulp is used to make paper and paper products. Logging is generally categorized into three categories: selective, clear-cutting and strip logging.
- Selective logging is selective because loggers choose only wood that is highly valued, such as mahogany.
- Clear-cutting is not selective. Loggers are interested in all types of wood and therefore cut all of the trees down, thus clearing the forest, hence the name- clear-cutting.
- Strip logging involves the clear-cutting of a relatively thin strip of forest that parallels a river (goes along the river) along a slope. A gallery forest (bordering the river) is left intact, but a strip is cut immediately upslope and the desirable timber is removed by a road that is also designed to parallel the river. Following this, another strip is cut several years later immediately upslope to the first strip and the road.
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Answer:
To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating. ... DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases.
Explanation:
Answer:
It is significantly easier to be infected with cutaneous anthrax as compared to other forms of anthrax.
Explanation:
LD50 is the lethal dose that can cause adverse effects and death. The LD50 of cutaneous anthrax is too low as compared to inhalation and gastrointestinal anthrax which means that only few Bacillus anthracis endospores can cause infection via cutaneous route while other routes require at least 200 times greater quantity to cause infection.
If the Earths polar Ice melts the ocean levels will increase because of the increased amount of water. Some peninsulas and islands would decrease because they would sink from the risen water.
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8. Microevolution
9. Net movement of alleles from one population to another.
