The correct option is D. The nervous system is made up of the brain, spinal cord, sensory organs and all the nerves that connect these organs with the rest of the body. These organs are responsible for control of the body parts; they do this by sending appropriate signals to the right body part. For example, nervous system can send signal to a muscle to contract when there is a reason to do so.
i dont under stand your question.
Answer:
The mutation in the MCR1 <em>gene </em>affected the structure and function of the MCR1 <em>protein</em>.
Half life formula
The number of unstable nuclei remaining after time t can be determined according to this equation:
N(t) = N(0) * 0.5^(t/T)
where:
N(t) is the remaining quantity of a substance after time t has elapsed.
N(0) is the initial quantity of this substance.
T is the half-life.
It is also possible to determine the remaining quantity of a substance using a few other parameters:
N(t) = N(0) * e^(-t/τ)
N(t) = N(0) * e^(-λt)
τ is the mean lifetime - the average amount of time a nucleus remains intact.
λ is the decay constant (rate of decay).
All three of the parameters characterizing a substance's radioactivity are related in the following way:
T = ln(2)/λ = ln(2)*τ
How to calculate the half life
Determine the initial amount of a substance. For example, N(0) = 2.5 kg.
Determine the final amount of a substance - for instance, N(t) = 2.1 kg.
Measure how long it took for that amount of material to decay. In our experiment, we observed that it took 5 minutes.
Input these values into our half life calculator. It will compute a result for you instantaneously - in this case, the half life is equal to 19.88 minutes.
If you are not certain that our calculator returned the correct result, you can always check it using the half life formula.
I think the answer is c, because in a city, there is very little natural shade like trees. also, asphalt creates more heat when the sun is directly on it.