<span>Hydrogen bonds do not
form in all molecules because hydrogen can only form these bonds with highly
electronegative atoms. It is a weak type of force that happens when a hydrogen
atom is bonded to an atom which has a high electronegativity. For water, it is present because hydrogen is bonded to oxygen which is very electronegative.</span>
Cortisol and norepinephrine
Answer:
The sympathetic nervous system is involved in preparing the body for stress related activities; the parasympathetic nervous system is associated with returning the body to routine, day-to-day operations. The two systems have complementary functions, operating in tandem to maintain the body's homeostasis.
Answer:
Responsiveness to the environment/adaptation. This is one of the 8 characteristics of living things.
Explanation:
The most massive part of the atom is the NUCLEUS which has a POSITIVE charge.
(That's why we have electrons to balance the charge)
I hope this helps!
