If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak. ... The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage.
It is the process<span> of transcribing or making a </span>copy<span> of </span>genetic information stored<span> in a</span>DNA<span> strand into a complementary strand of RNA (messenger RNA or </span>mRNA<span>) with the aid of RNA polymerases. ... The </span>process<span> follows transcription in which the </span>DNA<span>sequence is copied (or transcribed) into an </span>mRNA<span>.</span>
When lactose is not present, what happens to E. coli is that the genes that produce the enzymes needed to break down lactose are not expressed. The correct answer is B.
Viruses reproduce by inserting their genetic code into the genetic code of a cell, from there, an active virus will copy itself over and over until that cell bursts, where the new viruses can repeat the process. Another type of virus inserts itself into the genetic code, but does not actively reproduce. It sits and waits for the cell to reproduce for it, by splitting in the way cells do.
