Yes, you and your great uncle are descended from the same people, two of your great great grandparents, so you are biologically related, but for most purposes you are not "close relatives."
If she is your biological granddaughter (not step or adopted), yes.
Yes, a cousin-in-law is considered a relative by marriage, not by blood.
If by "stepson" you mean someone who was legally adopted into the family - yes, they are a legal relative. However, they are NOT considered to be a "blood" relative.
The only way you are a BLOOD relative is if you have the same blood line. You can't change a persons biological parents. If the step father adopts the child, then the child is by law their child and a family member, but not a literal blood relative.
Yes, a grandaunt is considered a blood relative. She is the sister of one of your grandparents, making her a part of your extended family lineage. While not a direct ancestor, a grandaunt shares genetic ties with you through your grandparents.
No. Descendants are your biological children, grandchildren, great grandchildren, and so on. Some people call these blood relatives, but not all your blood relatives are your descendants. For example, your first cousin is a "blood relative" but not your descendant. On the other hand, everyone is descended from someone, so everyone is a descendant - just not yours.
Yes, especially if someone in the family (particularly the mother, or other biological relative) carries that blood type or a similar blood type.
While a son-in-law is a relative, he is not a blood relative. Neither would be a daughter-in-law, step-father, step-mother, step-brother, step-sister, or the spouse of a 2nd marriage to one of your relatives. Blood relative means another person shares DNA within a group of related persons. So typically, your direct genetic and genealogical (family tree) line would go from grandparent to parent to you. All of your grandparents' children (your parents and their siblings), your siblings, and your own children (when you have children) are blood relatives. An adopted sibling would not be a blood relative to other biological siblings.
Yes, blood can be considered a type of biological agent as it contains various biological components, including cells, proteins, and pathogens like bacteria and viruses. It plays a crucial role in transporting nutrients, oxygen, and waste products in the body. Additionally, blood can serve as a medium for the transmission of infectious agents, making it relevant in discussions of biological hazards.
Yes, Odin and Loki are not biological brothers, but they are considered blood brothers in Norse mythology.
Toxins are not considered biological agents, as they are typically produced by living organisms but do not have the ability to replicate on their own like viruses, bacteria, and blood cells.
Yes, a biological family member is one that you are related to by blood.