It's answer d, but for info :
The question of wether or not a virus is alive is not resolved, some scientists say yes, some say no.
The fact is, viruses need another organism's enzymatic machinery to survive : alone, they cannot multiply or grow, produce or use energy, functions that are common to everything alive.
On the other hand, they do possess nucleic acids and proteins like living beings!
A phylum has more biodiversity because class is what narrows the phyla down even more. ( The order of largest biodiversity to smallest biodiversity is domain, kingdom, phylum, class, order, genus, species)
- speed up chemical reactions in the body / hormones
- transport materials across the body
- regulate body tissues and organs
Ex: insulin
Ex: hemoglobin in the blood transport oxygen around the body..yea XD
Anti-parallel DNA strands refer to those DNA molecules which contain 2 DNA strands that were held together by hydrogen. In cases that the DNA strands are not anti-parallel the non-symmetrical hydrogen bond will not be possible and will cause some issues.
