Answer:
C. <u>Trans-membrane protein channels that are always open to allow K+ to cross the membrane without the additional input of energy</u>
Explanation:
As we know that K+ leakage channels indicate the Potassium leakage channel. The best characterizes about K+ leakage channels is that there is a Trans-membrane protein channel which is always open to allow K+ to cross the membrane without the additional input of energy.
Actually when a cell dies its membrane potential gets more positive and finally reaches zero .
The key point is that the cells spend energy to maintain the intra-cellular ionic concentrations constant.
The membrane permeability of K+ is much higher than the membrane permeability of Na+.
Therefore, the correct choice is option (C).
Answer:

Explanation:
Given that,
Mass of the Moon, 
Mass of the person, m = 66 kg
The radius of Moon, 
We need to find the force between the person and the Moon. The formula for the gravitational force is given by :

So, the required force is
.
Both c and a could be right but I am steering more towards a.
Electromagnetic waves can travel in vaccum but mechanical wave does not