They form when continents collide; this boundary is a convergent / collision
Answer: C
Explanation:
If immigration and emigration numbers remain equal, decreased birthrate could cause a slowed growth rate
.
Decreased birthrate always affects the numbers in terms of population.The less births there are, the smaller the number of people. Even if the death rate remains constant a decreased birthrate will slow growth of population.
Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.<span>Man-made compounds such as chlorofluorocarbons (CFCs), hydrofluorocarbons (HCFCs) and halons destroy ozone in the upper atmosphere (stratosphere). The stratospheric ozone layer makes life possible by shielding the earth from harmful ultraviolet (UV-B) rays generated from the sun. Decreased concentration of stratospheric ozone allows increased amounts of UV-B to reach the earth's surface.</span>
Answer:
See below
Explanation:
A hypothesis theory and a scientific law are starkly different terms. A hypothesis is at a stage where it is tested in a way that either proves it right or wrong. In the case that it is proved right, it goes on further to be replicated by a several other groups of scientists. If the results/conclusions come out to be correct again, it is known as scientific theory - a more detailed explanation for some phenomenon. Further on, this theory will achieve the status of a scientific law when it has been studied in sufficient detail to give a unifying concept about the phenomenon.
Answer – B.
One of the two main functions of
the nuclear envelope is to allow separation of DNA from cytoplasm machinery. The
other main function of the nuclear envelope is the regulation of contents that
move in and out of the nucleus through small holes called nuclear pores. The nuclear
envelope is sometimes referred to as the nuclear membrane.
