10. Photosynthetic autotrophs evolved when: A. protists with chloroplasts engulf
ID: 161183 • Letter: 1
Question
10. Photosynthetic autotrophs evolved when:
A. protists with chloroplasts engulfed but did not digest cyanobacteria, which eventually evolved into a mitochondrion.
B. protists with a mitochondrion engulfed but did not digest cyanobacteria, which eventually evolved into chloroplasts.
C. protists with cyanobacteria and chloroplasts engulfed a mitochondrion but did not digest.
D. protists engulfed a mitochondrion and cyanobacteria but did not digest them, and eventually evolved into chloroplasts
11. What changes in the physical environment might have triggered the explosive diversification of animal life slightly after 600 million years ago?
A. Animal diversification was part of an evolutionary rebound from extinction caused by warming associated with the great ice age or, alternatively, a decrease in atmospheric oxygen likely triggered the initial adaptive radiation of major animal groups.
B. Animal diversification was part of an evolutionary rebound from extinction caused by cooling associated with the great ice age or, alternatively, a decrease in atmospheric oxygen likely triggered the initial adaptive radiation of major animal groups.
C. Animal diversification was part of an evolutionary rebound from extinction caused by warming associated with the great meteorite impact or, alternatively, a buildup of atmospheric carbon dioxide likely triggered the initial adaptive radiation of major animal groups.
D. Animal diversification was part of an evolutionary rebound from extinction caused by cooling associated with the great ice age or, alternatively, a buildup of atmospheric oxygen likely triggered the initial adaptive radiation of major animal groups.
12. What was the importance of the simple laboratory experiment by Stanley Miller and Harold Urey reported on in 1953?
A. They produced nearly all of the amino acids found in proteins in an experiment designed to mimic the conditions of Mars.
B. They produced nearly all of the amino acids found in proteins in an experiment designed to mimic the conditions under which life arose on Earth.
C. They produced nearly all of the DNA found in proteins in an experiment designed to mimic the conditions under which life arose on Earth.
D. They produced nearly all of the amino acids found in bacteria in an experiment designed to mimic the conditions under which life arose on Earth
13.How did North America come into being?
A. The modern North American craton, with Greenland attached to form Laurentia, was assembled from smaller Proterozoic cratons early in Cambrian time.
B. The modern North American craton, with Greenland attached to form Laurentia, was assembled from smaller Archean cratons early in Proterozoic time.
C. The modern North American craton, with Alaska attached to form Laurentia, was assembled from smaller Archean cratons early in Proterozoic time.
D. The modern North American craton, with Iceland attached to form Laurentia, was assembled from smaller Archean cratons early in Proterozoic time.
Explanation / Answer
10.
B. protists with a mitochondrion engulfed but did not digest cyanobacteria, which eventually evolved into chloroplasts.
11.
C. Animal diversification was part of an evolutionary rebound from extinction caused by warming associated with the great meteorite impact or, alternatively, a buildup of atmospheric carbon dioxide likely triggered the initial adaptive radiation of major animal groups.
12.
B. They produced nearly all of the amino acids found in proteins in an experiment designed to mimic the conditions under which life arose on Earth.
13.
C. The modern North American craton, with Alaska attached to form Laurentia, was assembled from smaller Archean cratons early in Proterozoic time.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.