I believe it would be Heat Radiation
Answer: C. 82.26%
Explanation:
Given : The red blood cell counts of women are normally distributed with


Let X be the random variable that represents the red blood cell counts of randomly selected woman.
Z-score : 
For X=4.2

For X=5.4

Now, the probability that the women have red blood cell counts in the normal range from 4.2 to 5.4 million cells per microliter will be :-

Hence, 82.26% of women have red blood cell counts in the normal range from 4.2 to 5.4 million cells per microliter.
Answer:
A spade placed in the fire turns hot.
Explanation:
The investigators could distinguish human hair from animal hair by the patter of pigmentation and by the medullary index.
The pigmentation in human hairs is denser toward the cuticle, whereas in animal hair is denser toward the medulla. Human hairs are usually one colour throughout the whole length, while animal hairs may change colour suddenly.
The medulla in humans is thinner than in animals: the medullary index for human hairs is 0.33 or less; the medullary index for animal hairs is 0.5 or more.