According to the 2015 fbi investigation, in trials where hair evidence was presented, what percentage included flawed testimony on hair samples?

Nh3 +02-no + h20 is unbalanced what is the balanced equation

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

The function of the ciliary escalator is to