BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 18, Problem 2SA
The first interval of Earth’s existence is called the ________.
| a. Cambrian | c. Proterozoic eon |
| b. Hadean eon | d. Archean eon |
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The first forms of life on Earth were ________. a. plants b. microorganisms c. birds d. dinosaurs
The fossil record shows how ________________
a. dead organisms were buried
b. organisms have changed over time and when organisms lived on Earth
c. parents of the offsprings
d. evolution occurred
The first forms of life on Earth were thought to be_________. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaurs
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...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following do not provide evidence that a meteor strike was a partial cause of the Cretaceous-Paleogene mass extinction? a. A potential meteor crater off the coast of Mexico b. High layers of iridium in soil deposits in the geologic record at that time c. Shocked quartz was formed in large quantities at that time around the potential impact site d. An ozone hole appeared in the atmosphere at the time of the meteor strikearrow_forwardLife first appeared on Earth ___________ of years ago.Choose one: A. billions B. hundreds of thousands C. thousands D. millionsarrow_forwardWhich of the following is characteristic of the end of the Paleozoic Era? a There was a mass extinction that eliminated 70% of marine life. b All of Earth's landmasses are joined together in a supercontinent called Pangaea. c Mountains began to form. d The supercontinent Pangaea separated into present-day continents.arrow_forward
- Most animal lineages evolved during the ____ period. a. Devonian b. Cambrian c. Silurian d. Cretaceous e. Ordovicianarrow_forwardIn which era did humans first appear on Earth? O A. Paleozoic O B. Mesozoic C. Precambrian O D. Cenozoicarrow_forwardMartian meteorites found in Antarctica were determined to possibly contain life. Scientists looked skeptically at these meteorites because a. their results suggest unusual chemical signatures that do not indicate life. b. features thought to be Martian fossils could be nonbiochemical formations. c. it is impossible for a piece of the Martian surface to fall to Earth. d. both a and b are true.arrow_forward
- The____ tool industry characterizes the Middle Paleolithic / Middle Stone Age and spans the time from____ - ____ years ago. a. Acheulean; 1 million - 500,000 b. Oldowan; 200,000 - 100,000 c. Mousterian; 300,000 - 40,000 d. Mousterian; 100,000 - 10,000arrow_forwardThrough______ , a body part of an ancestor is modified differently in different lines of descent. a. homologous evolution c. analogous evolution b. convergent evolution d. divergent evolutionarrow_forwardThe fossil record shows that in just the last 600 million years, there have been five instances of sharp decreases in the diversity and abundance of living organisms. what are these events? a. droughts b. mass extinctions c. reversals of the earth's magnetic field d. great migrationarrow_forward
- Euprimates appeared about ____ million years ago. This time period is called the ____. a. 65-55; Eocene b. 65-55; Paleocene c. 55-34; Paleocene d. 55-34; Eocene e. 34-24; Oligocenearrow_forwardWhich of the following theories as regards the origin of life on earth is accepted today? A. Theory of spontaneous generation B. Theory of special creation C. Cosmozoic theory D. Theory of abiogenesisarrow_forwardWe live in the Cenozoic era, and scientists know more about this era and the epochs it’s divided into than any other time period. Why is this? A. We know more about the Cenozoic era because this is the only era that has had a wide diversity of species living on Earth. B. We know more about the Cenozoic era because this is the most recent time period in the history of the Earth, and we have more information available to study. C. We know more about the Cenozoic era because the planet’s poles reversed magnetic fields at the beginning of this era. D. We know more about the Cenozoic era because fossils don’t exist to document previous eras.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license