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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- Cyanobacteria harness energy from the sun through photosynthesis, and oxidize water to provide electrons for energy generation. Thus, we classify cyanobacteria as _________. a. photolithotrophs b. photoautotrophs c. chemolithoautotrophs d. chemo-organotrophsarrow_forwardMicrobial mats __________. a. are the earliest forms of life on Earth b. obtained their energy and food from hydrothermal vents c. are multi-layered sheets of prokaryotes including mostly bacteria but also archaea d. all of the abovearrow_forward_______in the stomach of a cow release methane. a. Bacteria c. Aerobes b. Archaea d. Virusesarrow_forward
- Which of the following is NOT a unicelled organism? a. amoeba b. bacteria c. paramecium d. fungiarrow_forwardWhich type of organism does NOT photosynthesize? a. Heterotrophs b. Producers c. Cyanobacteria d. Algae e. Autotrophsarrow_forwardWhich of the following oxygenic phototrophs are believed to have generate the majority of oxygen gas in Earth’s atmosphere? a. Chlorobium b. Chloroflexus c. Clostridium d. Cyanobacteria e. purple bacteriaarrow_forward
- According to the endosymbiotic theory, _____ were/was originallyphotosynthetic bacteria.a. ribosomesb. chloroplastsc. mitochondriad. the nucleusarrow_forwardA doctor is performing a study under a very powerful microscope and records the following observations: Type of diet None observed Measure of growth No change in size or mass Amount of waste produced 0 micrograms Type of reproduction None observed Which of the following is the doctor most likely observing? A. a fungus B. a virus C. a protist D. a bacteriumarrow_forwardBacteria that derive their carbon from carbon dioxide and their energy from the oxidation of inorganic ions are termed what? a. chemolithotrophs b. chemoorganotrophs c. photoautotrophs d. photoheterotrophsarrow_forward
- Bacteria that serve as decomposers are______ . a. photoautotrophs c. chemoautotrophs b. photoheterotrophs d. chemoheterotrophsarrow_forwardScientists found that the number of bacteria in a handful of soil has more than the number of people who have ever lived, the most important reason for that is? Select one: a. Bacteria are unicellular organisms b. Bacteria can make their food c. Bacteria can live in different environments d. Bacteria are invisible organisms e. Bacteria are pathogenicarrow_forwardIf prokaryotes were to disappear suddenly, which part of the nitrogen cycle would shut down? Select all that apply Select one or more: a. Nitrification b. Fixation c. Denitrification d. Ammonificationarrow_forward
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