I believe your pointing to number 16, I believe the answer is B
Opportunistic infections are infections that occur more frequently and are more severe in people with weakened immune systems, including people with HIV.
There are so many examples for that in different areas, like organic germanium compounds experiment carried out in our lab recently.
Here's one link: http://www.alfa-chemistry.com/products/organic-germanium-24.htm
Unduplicated chromosomes are single chromosomes with a single line strand and one DNA molecule (if that's what you are looking for).
Answer:
Three major forms of DNA are double stranded and connected by interactions between complementary base pairs. These are terms A-form, B-form,and Z-form DNA.
Hope this helps!
