Exam 2: Evolution and the Diversity of Life

Despite the variety of sizes, shapes, and colors, a male German Shepherd and a Great Dane (two breeds of dogs) can mate with one another and produce offspring. Do these dogs belong to the same species?

All of the following statements are true about organisms that photosynthesize EXCEPT:

Which of the following characteristics apply to animals?

This organism lives in an aquatic environment and is a eukaryotic heterotroph without any cell walls. What kingdom does it likely belong to?

Based on the evolutionary tree, which letter represents the common ancestor of all eukaryotes?

Both plant and animal cells have all the following structures EXCEPT

Two organisms are very similar both in terms of molecular and physical characteristics. However, there is at least one characteristic that is not shared by these organisms-each organism has at least one evolutionary novelty that is not present in the other organism and thus these organisms do not interbreed. As a result, what is likely the lowest taxonomic classification that is shared by these organisms?

Which of the following is not true of protists as a group?

As a transitional form, Archaeopteryx is important because it provides insight into

Which structure originated from cyanobacteria?

Insects and bacteria appear to team up against a pesticide that is commonly sprayed on crops. The bean bug Riptortus pedestris is a common soybean pest and in a recent study was shown to acquire resistance to a common insecticide. This resistance is related to the presence of bacteria ( Burkholderia sp.) living within its gut. In this mutually beneficial relationship, more than 100 million bacteria can live within the insect's gut. Evidence suggests that these bacteria are able to break down the pesticide into carbon dioxide, which is used by the bacteria, and harmless waste products are then secreted. In a recent study, researchers fed bacteria-infested bean bugs and bacteria-free bean bugs a diet of soybean seedlings that had been treated with the pesticide. Most of the bacteria-infested bean bugs survived after eating the treated soybeans, but 80 percent of the bacteria-free bean bugs died. Carbon dioxide, which is a breakdown product of the pesticide, is likely used by the bacteria for which of the following?

Which of the following are heterotrophic eukaryotes with a cell wall?

What role did cyanobacteria play in shaping Earth's environment?

Based on the evolutionary tree, which domain is most closely related to animals?

Which of the following characteristics are shared by cells found in both plants and fungi?

A researcher is studying a parasitic bacterium that produces toxins that can harm its host. Thus, the researcher is studying a(n)

Insects and bacteria appear to team up against a pesticide that is commonly sprayed on crops. The bean bug Riptortus pedestris is a common soybean pest and in a recent study was shown to acquire resistance to a common insecticide. This resistance is related to the presence of bacteria ( Burkholderia sp.) living within its gut. In this mutually beneficial relationship, more than 100 million bacteria can live within the insect's gut. Evidence suggests that these bacteria are able to break down the pesticide into carbon dioxide, which is used by the bacteria, and harmless waste products are then secreted. In a recent study, researchers fed bacteria-infested bean bugs and bacteria-free bean bugs a diet of soybean seedlings that had been treated with the pesticide. Most of the bacteria-infested bean bugs survived after eating the treated soybeans, but 80 percent of the bacteria-free bean bugs died. In the experiment, what would be considered the control group?

Which of the following characteristics apply to plants?

Based on the evolutionary tree, which letter represents the common ancestor of animals and fungi?

Which of the following domains contain prokaryotic cells?