Why is the particular sequence bases in a segment of DNA important to cells ?

Nucleic acid certain protein cell membranes certain carbohydrates

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs