Exam 21: The Origin and Evolutionary History of Life

The theory that eukaryotic organelles originated as prokaryotes that survived ingestion by a host cell and ultimately evolved mutualistic relationships with the host cell is termed the:

Amino acids and other organic molecules were formed in the laboratory of Miller and Urey from which of the following?

The first organisms to release oxygen by photosynthesis were:

The earliest birds had all of the folowing traits EXCEPT::

The first fish:

The "Age of Fishes" is an informal name for the:

The atmospheric gas that prevents the majority of the sun's ultraviolet radiation from penetrating to the Earth's surface is:

Vascular plants and air-breathing animals first appeared during the:

Macromolecules that are capable of self-replication are:

The first photsynthetic autotrophs used the energy of the sun to split H₂O because it is not very electronegative. _______

The greatest mass extinction of all time, which occurred at the end of the Permian period:

Which of the following gases was not present in the Earth's early atmosphere but appeared after the evolution of certain organisms?

Dragonflies that ranged in size from those smaller than today's dragonflies to some with wingspans of 75 centimeters (2.5 feet) appeared during the:

Not much physical evidence of life is available from rocks of the Precambrian because these ancient rocks:

A compound that could not have been present in the early atmosphere, because it is quite reactive and would have broken down organic molecules that were a necessary step in the origin of life on Earth, is:

During the Pleistocene epoch, plant communities changed dynamically in response to:

Amphibians' history include all of the following EXCEPT:

Which of the following statements about dinosaurs is false?

The serial endosymbiosis hypothesis states that the origin of mitochondria and chloroplasts was the result of a mutually advantageous symbiotic relationship between two eukaryotic organisms. ___________

The Earth's early atmosphere was probably strongly: