Answer:
Usually, Populations have a genetic variation among individuals, which is important to the population's ability to survive in different situations that have an effect on the natural selection. There are different factors which can increase or decrease the genetic diversity, and influencing natural selection.
These factors include an environmental factor, one of the major factors, which may cause changes in the genetic variation of a population and influence the natural selection. A famous and important example of environmental factors affecting natural selection was during the Industrial Revolution, when many more grey moths made up the moth population.
This was so that they could blend in with the soot from factories to avoid predators.
Causes fishermen to lose at least 165 million pound of fish a uear today and 717.1 million pound of potential future catch. Desalted water also puts drinking water supplies at risk because sea water contains chemicals such a boron, taht freshwater does not.
One of the birth control which could also be classified as ineffective which describes the statement above is the withdrawal or also known as the pulling out method. This is also describe as ineffective because sometimes the pair who is performing the intercourse, in which the male will sometimes not realize that he has already ejaculated. This is one of the birth control method being used instead of using contraceptives.
<span><span>Burning of fossil fuels emits sulphur dioxide.
<span><span>S (in coal) + O2SO2
</span></span></span><span>
Sulphur dioxide reaches the atmosphere, it oxidizes to first form a sulphate ion.
<span><span>
2 SO2 + O2 2 SO3</span></span></span><span>
The sulphate ion joins with hydrigen atoms in the air and becomes sulphuric acid. This then falls back down to earth as "acid rain"
<span><span>
SO3 + H2O H2SO<span>4
Hope this at least helped a little c:</span></span></span></span></span>
Answer:
Oxygen in the atmosphere is a molecule because it contains molecular bonds. It is an element because it is made from atoms of only one element - oxygen.
Explanation:
