Write the correct base letters in the blank shapes for RNA shown below.

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

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.