Which of the following adaptations in wooly mammoths could have best prevented their extinction?
shedding of fur
darker color of fur
growth of an extra layer of fur
increase in the thickness of fur
will mark brainliest! (i think it is c or d but i'm confused)

Are salt and soap nutrients or toxins for yeast? explain.

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

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.