The three-domain system divides organisms into groups based on similarities in their:

The three-domain system, (proposed by Woese) divides organism into groups based on differences in the sequences of nucleotides in the cell's ribosomal RNAs –rRNA ( because their structure changes very little over time) and cell's membrane lipid structure.

 So, the groups are Eukarya, Bacteria and Archea.

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )