Most fad diets focus on restricting certain types of foods and nutrients. what do you think would happen if someone ate an extremely low-protein diet without the approval of a doctor? what side effects might the person experience?

Which is it a characteristic of the animal kingdom? a. they include both vertebrates and invertebrates b. their skin is covered with hair or fur c. they are heterotrophs d. they are eukaryotic

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian

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.