10.15–10.18
10.15–An overview of the diversity of life on earth: organisms are divided into three domains.
All life on earth can be divided into three domains–
Q
The mass extinction that occurred on earth 65 million years ago was immediately followed by:
- a) the rise of archaea.
- b) the emergence of the first non-
photosynthetic organisms. - c) the rise of the reptiles, including the dinosaurs.
- d) an increase in atmospheric oxygen levels.
- e) the rapid divergence and radiation of modern mammals.
Prokaryotes are classified into ________ domain(s).
- a) 1
- b) 2
- c) 3
- d) 4
- e) 5
All protists are alike in that all are:
- a) bacterial.
- b) photosynthetic.
- c) eukaryotic.
- d) prokaryotic.
- e) archaeal.
Which of the following pairs of domains share the most recent common ancestor?
- a) archaea and eukarya
- b) bacteria and eukarya
- c) archaea and bacteria
- d) None of the above; all three domains evolved from different ancestors.
- e) None of the above; all three domains are equally related to each other.
Which of the following groups would be placed nearest the fungi in an evolutionary tree based on DNA sequences?
- a) plants
- b) bacteria
- c) animals
- d) archaea
- e) protists
