theory of continental drift, the world was made up of a single continent through most of geologic time. ... According to the generally acceptedplate-tectonics theory<span>, scientists believe that Earth's surface is broken into a number of shifting slabs or </span>plates<span>, which average about 50 miles in thickness....</span>
They can ensure that chemical reactions occur in safe temperature by only speeding up the reaction in optimum temperate range.
If the temperature is too low, the enzymes may be inactive, and the chemical reactions may be slow.
If the temperature is too high, the enzyme would be denatured and it can no longer function as a biological catalysts.
Im pretty sure its plants
Three of the four nitrogenous bases that make up RNA — adenine (A), cytosine (C), and guanine (G) — are also found in DNA. In RNA, however, a base called uracil (U) replaces thymine (T) as the complementary nucleotide to adenine (Figure 3). ... (Remember, DNA is almost always in a double-stranded helical form.)
