BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 16, Problem 6SA
True or false? Wrinkly textures in rock that formed from ancient biofilms living in marine sediments are considered trace fossils.
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Organisms that look similar have been observed to have differences when preserved in rocks of different ages.
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Biologists most often use ____________ for radioisotope dating, but its half-life is relatively ____________.
Relative dating determines the relative age of rocks/fossils by ____________ them to known older or younger layers.
Another name for this hard calcareous plate would be a
Chapter 16 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 16 - The number of species on an island usually depends...Ch. 16 - The bones of a birds wing are similar to the bones...Ch. 16 - Evolution _______ natural selection. a. is the...Ch. 16 - A trait is adaptive if it _______. a. arises by...Ch. 16 - In which type of rock are you more likely to find...Ch. 16 - True or false? Wrinkly textures in rock that...Ch. 16 - If the half-life of a radioisotope is 20,000...Ch. 16 - Did Pangea or Gondwana form first?Ch. 16 - Forces that cause geological change do not include...Ch. 16 - Through _______, a body part of an ancestor is...
Ch. 16 - Prob. 11SACh. 16 - A mutation that alters the embryonic expression...Ch. 16 - The last dinosaurs died _______ million years ago.Ch. 16 - All of the following data types can be used as...Ch. 16 - Match the terms with the most suitable...Ch. 16 - Prob. 1CTCh. 16 - If you think of geologic time spans as minutes,...
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- True or false? Fossils can be body parts of ancient organisms such as bones,shells,teeth or plant leavesarrow_forwardVolcanic ash can be used to date fossil finds because each time it is expelled by an eruption it has the same relative proportions of radioactive isotopes. True or Falsearrow_forwardWhich statement is true? Recent remains of plants or animals on topsoil are fossils. Imprints of leaves or footprints in sedimentary rock are fossils. Insects preserved in hardened tree sap are not fossils. Petrified skeletal bones from an ancient mammal are not fossilsarrow_forward
- Which one of two radiometric dating methods that we studied in our course is useful for the identification of absolute age of buried organic remnants (bones, charcoal, woods)? Can you please help me with this questionarrow_forwardIn the shale unit, you find the following fossil: What is the mode of preservation of this fossil? Recrystallization Internal mold Replacement External mold Carbonizationarrow_forwardPart 1. Stratigraphic Dating: A Café Scene Relative dating methods establish the date of something as older or younger than something else rather than anchoring its age to an absolute, scaled timeline, as in absolute dating. So, we determine the sequence of at least two things (two events, two deposits, etc.) and establish what happened first, what happened next, and so on. In archaeology, relative dating relies on stratigraphy—what material is located above or below something else. The Law of Superposition tells us that material positioned underneath something else is usually older and material overlying a deposit is younger than the deposit, unless the layers have been disturbed. The photos that you will be shown depict a collection of items on a table: a cup, saucer, newspaper, and tickets. Imagine that these items are part of a single context such as a layer in an excavation and you want to determine whether they were deposited all at once as a single event or one after the other…arrow_forward
- Radiometric dating _______. has a substantial error factor can only be used for dating animal fossils can be used to date sedimentary rock, but not fossils is basedon the premise that each isotope decays at a constant rate is unpredictable because of changes in temperature and pressurearrow_forwardTrue or false. The supercontinent pangaea formed about four billion years ago.arrow_forwardWhich of the following is not a fossil?a. Dried-out animal bones in a layer of desert sandb. A patch of fur encased in amberc. A woolly mammoth frozen in Arctic permafrostd. Remains of an extinct whalelike animale. The impression of a plant leaf in sandstonef. The wrinkly texture of shale imprinted withbiofilms in sedimentsarrow_forward
- Fossils found in deeper layers of the Earth generally have ____ 14C than fossils found in the upper layers. a. more c. the same amount of b. less d. different types ofarrow_forwardA scientist has a fossil that was found in a layer of rock close to Earth’s surface. He believes that the fossil is around 12,000 years old. Which method would best allow the scientist to confirm the actual age of the fossil? finding another fossil in a deeper layer of rock finding another fossil in the same layer of rock using carbon/nitrogen absolute dating using potassium/argon absolute datingarrow_forwardFossil A found closer to the surface compared to Fossil B. Which of the following conclusions can be made based on this statement?arrow_forward
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