I believe the best option to your question will be A.
HIV, because the other answers aren’t contagious.
Answer: layers
of sheathing
The
brain is protected by the skull and several layers of sheathing
from physical damage and insulate it against extreme temperatures. It is
encapsulated in several layers of connective tissue sheathing known as meninges
protecting fragile neural tissue and insulate the brain from different extreme temperature.
What causes disorders such as Klinefelter syndrome and Turner syndrome ?
- non disjunction of sex chromosomes
Turner syndrome, and Klinefelter syndrome constitute the most common chromosomal abnormalities.
In males, the presence of an extra x-chromosome (47, XXY) results in a condition known as Klinefelter syndrome.
- type of sex chromosome abnormality Klinefelter syndrome
