We sweat to regulate body temperature. my younger brother was born without sweat glands so you can trust me on this one!
Answer:
Explanation:
The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high. The ozone layer, which absorbs and scatters the solar ultraviolet radiation, is in this layer. The thermosphere starts just above the mesosphere and extends to 600 kilometers (372 miles) high
The invention of DNA replication through PCR!
Because of this technology, we can now classify organisms based on genetic relatedness instead of the similarity between physical traits. The more we use PCR to identify different organisms across all “kingdoms” the more the previously established family tree of life shifts into something new