If you observed green material on the surface of a pond, how could you determine whether it belonged to Kingdom Protista or Kingdom Eubacteria? Protists have organized nuclei while bacteria do not. There is no way to tell the organisms apart. Bacteria have an organized nuclei while protists do not. Eubacteria do not live in the water.

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.

Using meiosis, the sporophyte produces spores that are .

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.