For which one of the following observations were both lamarck's hypothesis and darwin's hypothesis in complete agreement? a. acquired characteristics are inherited. b. gradual evolutionary change explains why organisms are well-suited to their environments. c. more complex species are descended from less complex species. d. use and disuse of organs determines their size in progeny.

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

You see a white marker with an orange circle and black lettering. what does this marker tell you

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.