The answer would be B. chromosome 21
The babys organs will start to develop, and the baby will be able to sleep and hear other people outside the womb, the bby starts to grow more essential things it will need to live outside of the mothers womb.
Homeostasis is the upkeep of a steady interior condition. In the Biology setting, it implies a consistent body condition, for instance, steady body temperature, blood glucose level. Metabolism alludes to the responses that occur in the body which enables life to be kept up. You need digestion occurring keeping in mind the end goal to look after homeostasis.
DNA is condensed by a certain amount just on its own, just by its own interactions within the DNA molecule,..but whne proteins get involved it gets condensed 30000 fold
<span>what happens is that proteins called histones are like hockey pucks, and DNA wraps around it 1.5 times and then goes to another histone and wraps around that so that it looks like beads on a string (i hope that makes sense, its the only way to describe it) </span>
<span>these histones condense this DNA a lot, and when the histones get methylated then the DNA packs together even closer to get heterochromatin (VERY densely packed DNA)...the theory here is that DNA has a net negative charge due to the phosphate groups in the DNA backbone and doesnt allow the DNA to come together as closely as it could (like charges repel like charges), but when histones are methylated, the negative charge on the DNA is masked by the methyl groups and DNA can come together closer </span>
