A scientist wants to observe how a plant reacts to a certain type of auxin hormone that the plant naturally produces. She places a small patch that releases auxin on one side of a plant. She places the plant in a room where light shines on the plant in all directions. A drawing of the plant before the experiment and after a week of the experiment is shown below. Refer to the plant auxin experiment above. How did the plant respond to the auxin stimulus?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

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.

Geoengineering will have no negative effects on the environment. select the best answer from the choices provided t f