<span>It may be difficult for ecologists to determine the size of a bird population if that population migrates to different locations throughout the year. During migration, some birds may split off from the group and not return, others may die, and still others may join. Therefore, the bird population will be in constant flux. It is hard to know, when the birds return to their prior location, if the population consists of the same group of birds (in addition to deaths and births) or whether it has grown or shrank through other means. However, to estimate the size, an ecologist can track a migratory flock through several years, counting each year to get a general sense of the population size. Additionally, given one measurement, an ecologist could consider the average lifespan and birth rates of the population to extrapolate the size of the population in subsequent years.</span>
The parcelization and urbanization of forests bring with them serious consequences for nature and humans beings, although we probably see it as an advance; deforestation, logging, burning, seriously affect the vegetation, and the fauna of a forest, the human workforce , the deviation of rivers and the modification of natural zones seem to be a development of society, but in the long run it affects more to humans than to nature itself, because we are the ones who will not have natural lungs to breathe, and those who soon will be drowned with our own pollution, because there are no forests, no nature to purify the air we need.
Because mostly some microorganism may be very small and harmful that can affect humans or animals just by the experience of the microorganism.
Answer:
A fossil is remain or impression of dead plants or animals which have lived thousands of years ago it can also be described as any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood, oil, coal, and DNA remnants
Types of Fossils. Fossilization can occur in many ways. Most fossils are preserved in one of five processes preserved remains, permineralization, molds and casts, replacement, and compression.
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Answer:
Sulfur; nitrogen.
Explanation:
Acid precipitation results when sulfur and nitrogen compounds react with water in the atmosphere.
This acid precipitation is also known as acid rain and it is typically caused by the chemical reaction between sulfur oxide and nitrogen oxide which are released into the air as a result of burning fossil fuels, with water and other chemical elements present in the atmosphere.
Generally, acid precipitation (acid rain) usually have a pH of about 5.1 or below and as such, it is very acidic nature i.e possessing a large amount of hydrogen ions.
Hence, acid precipitation (acid rain) when washed to the earth has negative or harmful effects on various living and non-living organisms such as animals, plants, cars, buildings etc.
