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Answer:
Basically, the Atrioventricular valves are Mitral and Tricuspid valves located between the atrium and ventricles. Their main functions is to “prevent the backflow of blood from the ventricles into the atrium during the ventricular contraction (systole).
Explanation:
The current population of a threatened animal species is 1.6 million, but it is declining with a half-life of 25 years. How many animals will be left in 35 years<u> The decay law i</u>
<u>p(t) = 1,700,000 (1/2)t/25</u>
<u>where t is in years and p(t) is the population at time t. Plug in 40 and 55 for t.</u>
<h3>What is
threatened animal?</h3>
Any species (including those of animals, plants, and fungi) that is likely to become endangered in the near future is considered to be a threatened species. The population dynamics measure of critical depensation, a calculation of biomass related to population growth rate, is occasionally used to identify threatened species. This quantitative indicator is one way to gauge how endangered an area is. When discussing IUCN categories, the terms threatened and vulnerable may be used interchangeably; however, threatened generally refers to the three categories (critically endangered, endangered, and vulnerable), whereas vulnerable generally refers to the category that is least at risk among the three. However, since all threatened species are vulnerable species, they can usually be used interchangeably.
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The cryosphere is the frozen water part of the Earth system. Beaufort Sea, north of Alaska. One part of the cryosphere is ice that is found in water. This includes frozen parts of the ocean, such as waters surrounding Antarctica and the Arctic.
Senescence-like phenotype is normally regarded as a suppressive manner, both by preventing cancer cellular proliferation and suppressing malignant development from pre-malignant to malignant disorder.
Senescence is generally regarded as a tumour suppressive method, both with the aid of preventing cancer cell proliferation and suppressing malignant progression from pre-malignant to malignant disease. Cell senescence limits the replicative potential of cells, as a consequence stopping the proliferation of cells which are at distinct stages of malignancy.
A recent frame of evidence shows that induction of senescence can be exploited as a foundation for most cancers therapy. Senescence is a double-edged sword which could function in contrary directions. It far a capacity mechanism for a cell to avoid malignant transformation. however, senescence can also sell most cancers improvement with the aid of changing the cellular microenvironment thru a senescence-related secretory phenotype.
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