Chemical digestion involves the breaking down of food with enzymes;
mechanical digestion is breaking down food by chewing and tearing with teeth.
Chemical digestion is the breakdown of fats; mechanical digestion is the breakdown of proteins.
Chemical digestion is done only by the major structures of the digestive system; mechanical digestion is done by the accessory structures of the digestive system.
b. bacteria
c. nucleic acids
d. proteins
(1) increased warming of local ecosystems
(2) increased exposure to ultraviolet light
(3) reduction in the pH of acid precipitation
(4) reduction in the frequency of floods and
droughts
Answer:
The correct answer is option (2) "increased exposure to ultraviolet light".
Explanation:
The ozone shield or the ozone layer is a region of the atmosphere comprised of high concentrations of ozone that absorbs most of the Sun's ultraviolet radiation. Therefore, damage to the ozone shield will cause increased exposure to ultraviolet light over the United States. This could cause harmful consequences such as an increase of cases of skin cancer, sunburn and cataracts.
b. The circulatory system would fail, and the entire organism would suffer.
c. The organism would slow down its breathing, so that the heart could recover.
d. Tissue from another part of the body would take over to keep the heart beating.
Answer:
The major reservoir for Ammonia is the natural soil, where it is present in abundance.
Explanation:
In soil, ammonia is found in quite abundance, where it is changed into nitrate through a process commonly knows as Nitrification. In the nitrification process, first, nitrite is formed which is followed by its conversion into nitrate by a bacteria known as Nitrobacteria. Finally, this nitrate is consumed by the plants, which are then eaten up by the animals.
Ammonia is a crucial compound found variously within the biosphere. In animals, it is processed into safer compounds for excretion, while in the environment, it is both a product of decomposition processes and an important component for agricultural practices.
Ammonia is a nitrogenous compound that plays a significant role in various biological and ecological contexts. In terrestrial animals, the major reservoir for ammonia is the biological system where it is present in compounds such as proteins and nucleic acids. Through the process of metabolism, animals convert the toxic ammonia into urea or uric acid, which are safer for the organism. This is exemplified by the urea cycle in mammals and the corresponding processes in birds, reptiles, and terrestrial arthropods.
Additionally, ammonia is an important product of ammonification, a process that occurs during the decomposition of nitrogen-containing organic compounds. A small percentage of ammonia is also released into the atmosphere.
Furthermore, ammonia is crucial for our economy, particularly in the agriculture industry. It is heavily utilized in the production of fertilizers and also serves as a vital ingredient for the growth of several crops.
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