Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 23, Problem 3TYU

A researcher discovers a fossil of what appears to be one of the oldest·known multicellular organisms. The researcher could estimate the age of this fossil based on

  1. A.    the amount of uranium·238 in the fossil.
  2. B.     the amount of carbon·14 in the fossil.
  3. C.     the amount of uranium·238 in volcanic layers surrounding the fossil.
  4. D.    the amount of carbon-14 in volcanic layers surrounding the fossil.
Blurred answer
Students have asked these similar questions
Radioisotopes are useful in dating fossils and rocks because   a. they are present in very high amounts.   b. they decay rapidly.   c. they decay in a predictable pattern over long time period.   d. their rate of decay changes over time.
Martian 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.
Choose the best below ? Which of these steps probably occurred first in the chemical andbiological evolution of life? a. The cell membrane of a protobiont formed.b. Formation of the first organic moleculesc. The genetic material was RNA.d. Simple organic monomers formed from inorganic materials.
Knowledge Booster
Background pattern image
Biology
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
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Biology
ISBN:9781305967359
Author:STARR
Publisher:CENGAGE L
Fossil: The Language & History of Paleontology; Author: Alliterative;https://www.youtube.com/watch?v=x9yNwRBlKtU;License: Standard youtube license