an educated guess that is a possible explanation for an observation

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

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.