Create the inverse DNA<span> or </span>RNA<span> strand. For example, the sequence "ATGC" is converted to "CGTA". Replace thymidine (T) by uracil (U). For example, the sequence "ATUGC" is converted to "AUUGC".</span>
Hey there!
The answer would be ultrasound.
The ultrasound is considered safe because it uses sound waves for the detection of tissue, organ, baby etc. These waves are considered safe and transfer only a small amount of heat to the tissue in which the ultrasound is done. A little amount of heat is not at all harmful to the body in any means. Early defects of baby can be detected through this procedure, the merits of the process is much higher than its demerits.
Hope this helps !
The appearance of fossils would the the answer.
Although there has been some scientific debate about what fossil strata should mark the beginning of this period, the "International Geological Congress" determined that the Cambrian period was approximately 543 million years ago of which the first appearance in the fossil record of worms that made horizontal burrows was discovered.
The answer to this question is nitrates. Nitrate is a
compound that is composed of nitrogen and oxygen. Nitrates are used as a
preservatives in food, can be used as fertilizer, an ingredient to make gunpowder,
and also an ingredient in making explosives or bomb.
