Answer:
One of the two X chromosomes is randomly and permanently inactivated in cells other than egg cells, this is called <u>X-inactivation</u> or <u>lyonization</u>
Explanation: This is all I could find, sorry if it's not what you need.
Answer:
The answer is B.
Explanation:
A is incorrect because water is a molecule with covalent bonds.
C is incorrect because water is <em>very</em> much polar, since Oxygen has a relatively higher electronegativity than Hydrogen (so the difference of their electronegativities would be greater than 0.3 and less than 1.7).
D is incorrect because the bonds between elements in the water molecules is not hydrogen bonding since water is a molecule in its own right, with strong bonds.
Your body detects a change in temperature before it goes to the brain then to the vessels so the answer is C! :)
C.
I do not think anybody would mention the third option for it doesn't make to much sense anyway.
Hope it helped,
Happy homework/ study/ exam!
