(4) organisms in a changing environment must adapt to acquire necessary traits and survive
According to the Dietary guidelines for
America, men aged 19 and older should
consume an average of 2.640 calories and
women should consume an average of 1.785.
However, these numbers may vary according
to each person and their way of living. Some
bodies will need more than that and some
other less. that would depend on physical
activities and work among other things.
THANKS!o
COMMENTS
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>
Answer:
hope it's help you ok have a good day
