Transcriptionally inactive regions of the genome are typically heavily methylated. true or false?

The answer is true.

DNA methylation is a process by which methyl groups are added to the DNA, more precisely to its nucleotides adenine or cytosine (they are methylated) via enzymes called DNA methyltransferases. This process as a result can change the activity of a DNA. For example, if DNA of gene promoter is methylated gene transcription is repressed. The opposite process is DNA demethylation.

So, DNA methylation is an epigenetic mechanism meaning that gene activity can be changed and inherited that way, but the sequence  of DNA remains the same.

the answer for this question would be d. glaciers

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .