Karyotypes were first performed using blood samples taken from youngsters and adults. Later, a pre- birth process called amniocentesis was developed which allowed medical researchers to obtain samples of cells from extraembryonic fluid located in the amniotic sac, which surrounds an unborn child.
False 23 the presence of prosthetic implant indicates that the skeleton is definitely not prehistoric True 24 a skull B c long limb bones Dall of 41
DNA is an example of a complex biological polymer called a nuclei acid. Nucleic acids are made up of many smaller sub units called nucleotides. The components of a DNA nucleotide are deoxyribose, phosphate group, nitrogen group. There are four possible bases in a DNA molecules which includes adenine, cytosine, guanine and tymine.
7:25 pm. High tides are 12 hours and 25 mins apart. So 12 hours from 7:00 am is 7:00 pm, add 25 mins and you have 7:25 pm. Hope this helps! ;)
