Suppose you wanted to determine whether you had adequately sampled the species richness of a given amphibian community. which result would most likely lead to the conclusion that more sampling was needed to assess the species richness? group of answer choices a) a high shannon index value b) a low shannon index value c) a linearly increasing species accumulation curve d) a species accumulation curve that reached a threshold.
A linear species accumulation curve.
Species accumulation curve may be defined as the curve used to determine the total number of the species present present in a particular area. Different type of species accumulation curve depending on the species richness.
The linear species accumulation curve determines that the number of species increases with the sampling. The more sampling of the amphibian community increases the number of individuals determines that it shows the linear species accumulation curve.
Thus, the correct answer is option (c).
the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.
a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis. the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years. fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas. other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.
the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763". the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.
in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world. non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%. world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.