Which of the following is the best description of a gene? O A. A learned behavior
B. A physical or behavioral characteristic
C. A section of DNA that codes for traits
O D. The basic unit of a nucleic acid

C. A section of DNA that codes for traits.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.