Answer:
The correct answer is option d.
Explanation:
An illustration of epigenetic change is a microbe, which can stimulate modifications in the host DNA, causing suppression of defenses or weakening of individual cells. Epigenetic changes modify the physical composition of DNA.
One of the examples of epigenetic change is DNA methylation. DNA methylation refers to the supplementation of methyl group, which inhibits some of the genes from getting expressed. One of the conditions of DNA methylation is cancer.
In the majority of cancer, the tumor cells go through global hypomethylation. The tumor suppressed genes seem to turn highly methylated in the conditions of cancer.
Answer:
Absolute dating is the process of determining an age on a specified chronology in archaeology and geology. Some scientists prefer the terms chronometric or calendar dating, as use of the word "absolute" implies an unwarranted certainty of accuracy.
Answer:
Inside the nucleus.
Explanation:
Nuclear pores are the communication gate between the nucleoplasm and the cytoplasm, and all transport between the two compartments occurs through them. Therefore, they are a key element in function, in the response to external signals and in the differentiation of cells. And this is because they condition, for example, the exit of messenger RNA to the cytoplasm, or the entry into the nucleus of transcription factors that determine gene expression.
The proteins that are part of the pore complex are called nucleoporins. In yeasts there are about 30 different nucleoporins in each nuclear pore, while in metazoans they can be 40 or more. But in the same pore there may be repeated proteins and this causes a pore of a mammalian cell to be formed by about 500 to 1000 total nucleoporins. The pore complex measures about 100 to 150 nm in diameter, with about 40 nm of useful internal diameter, and 50-70 nm in height. It is one of the largest protein complexes in the cell, with about 125,000 kDa molecular weight.
Answer:
Subsidence
Explanation:
subsidence is a process where cold temperatures in the polar regions cause air to descend to create high pressure it's basically the difference in temperatures that make the pressure so high because hot atoms expand and becomes less dense and rise while cold air contracts and becomes more dense and falls. hope this helps
Write what he is thinking down. And find evidence to support his thoughts
