Question 1 of 5 Share Facebook Twitter LinkedIn WhatsApp Email Copy Link Which list contains only biotic factors? A. winds, sunlight, fern, frog B. soil, sunlight, frog, tree C. frog, butterfly, fern, tree D. Soil, frog, butterfly, fern Submit Answer
Question 2 of 5 Share Facebook Twitter LinkedIn WhatsApp Email Copy Link Scientists have been examining increased levels of carbon dioxide in the atmosphere and its effect on the growth of marine viruses, the growth of their bacterial hosts, the ocean's temperatures, and the circulation of ocean waters. Which factor being studied by the scientists is biotic? A. Ocean temperature B. Bacteria C. Ocean circulation D. Carbon dioxide Submit Answer
Question 3 of 5 Share Facebook Twitter LinkedIn WhatsApp Email Copy Link A population of Pseudomonas aeruginosa is exposed to successive, short rounds of ampicillin and chloramphenicol. What will happen to the population? A. The population will become resistant to chloramphenicol. B. The population will die. C. The population will become resistant to ampicillin and chloramphenicol. D. The population will become resistant to ampicillin. Submit Answer
Question 4 of 5 Share Facebook Twitter LinkedIn WhatsApp Email Copy Link Climate change is affecting the chemistry of the world's oceans. In particular, the ocean water is becoming more acidic. For purple sea urchins, this poses problems as their calcium-based exoskeletons may dissolve in acidic conditions. In a certain population of purple sea urchins, some individuals possess a trait that makes their exterior more resistant to acid. If global climate change continues (as predicted) to make ocean water more acidic, how might this population of purple sea urchins evolve in response to this increased acidification? A. Purple sea urchins with a trait that make their exoskeletons less resistant to dissolving in acidic water would become more common. B. Purple sea urchins with a trait that make their exoskeletons resistant to dissolving in acidic water would become more common. C. Purple sea urchins with a trait of having longer, more rigid spines would become more common. D. Purple sea urchins with a trait of having shorter, more flexible spines would become more common. Submit Answer
Question 5 of 5 Share Facebook Twitter LinkedIn WhatsApp Email Copy Link What evolutionary mechanism would explain the increased frequency of male birds with narrow, elongated tail feathers within this population? A. Gene flow B. Sexual selection C. Genetic drift D. Artificial selection Submit Answer