BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 18, Problem 7SA
Photosynthesis carried out by one group of ________ resulted in Earth's first increase in atmospheric oxygen levels.
| a. archaea | c. protists |
| b. bacteria | d. algae |
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Chapter 18 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 18 - An abundance of___________ in Earths early...Ch. 18 - The first interval of Earths existence is called...Ch. 18 - The prevalence of ironsulfur cofactors in...Ch. 18 - Miller and Urey created a reaction chamber that...Ch. 18 - RNA in ribosome catalyzes formation of peptide...Ch. 18 - By one hypothesis, clay________. a. facilitated...Ch. 18 - Photosynthesis carried out by one group of...Ch. 18 - Mitochondria are most closely related to...Ch. 18 - The presence of ozone in the upper atmosphere...Ch. 18 - A ribozyme consists of ___________. a. clay c. DNA...
Ch. 18 - A rise in oxygen in Earths air and seas set the...Ch. 18 - Which of the following was not present by the end...Ch. 18 - The first chloroplasts evolved from ___________....Ch. 18 - During the Precambrian, _______. a. atmospheric...Ch. 18 - Arrange these events in order of occurrence, with...Ch. 18 - Researchers looking for fossils of the earliest...Ch. 18 - Rickettsia bacteria always live as parasites...
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- The first organisms that oxygenated the atmosphere were ______. a. cyanobacteria b. phootrophic organisms c. anaerobic organisms d. allof the abovearrow_forwardMitochondria most likely evolved from_______. a. a photosynthetic cyanobacterium b. cytoskeletal elements c. aerobic bacteria d. membrane proliferationarrow_forwardA rise in oxygen in Earths air and seas set the stage for the evolution of _______. a. aerobic respiration c. photosynthesis b. fermentation d. sexual reproductionarrow_forward
- Protists with the capabilities to absorb nutrients from dead organisms are called ______. a. photoautotrophs b. autotrophs c. saprobes d. heterotrophsarrow_forwardThe first forms of life on Earth were thought to be_____. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaursarrow_forwardThe endosymbiotic theory explains the:a. origin of the first prokaryotic cells.b. origins of mitochondria and chloroplasts in eukaryotes.c. evolutionary relationship between animals, plants, and fungi.d. method of reproduction in protists.arrow_forward
- The evolution of photosynthesis resulted in a. an increase in the amount of O2 in the atmosphere. b. the initial appearance of heterotrophs. c. global warming. d. an increase in the amount of CO2 in the atmospherearrow_forward_______ are oxygen-releasing photoautotrophs. a. Spirochetes c. Cyanobacteria b. Methanogens d. Bacteriophagesarrow_forwardIt is thought that the mitochondria and chloroplasts of eukaryotic cells came froma. the development of the internal membrane system.b. protists.c. mutation.d. endosymbiosis of bacteriaarrow_forward
- Which of the following extremophiles is the best model for the earliest organisms on Earth? A. a prokaryote found near hydrothermal vents B. an archaean capable of surviving in the polar ice caps C. an anaerobic archaean species D. a bacterium that thrives in a highly acidic environmentarrow_forwardDecomposers a. break down dead organic matter in the environment by secreting digestive enzymes. b. break down living organic matter by secreting digestive enzymes. c. destroy living cells and then break them down with digestive enzymes. d. live in close association with another species.arrow_forward_______in the stomach of a cow release methane. a. Bacteria c. Aerobes b. Archaea d. Virusesarrow_forward
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