BIOLOGY: CONCEPTS AND INVESTIGATIONS,
5th Edition
ISBN: 9781266382307
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 19.6, Problem 2MC
What are some alternative hypotheses for why the researchers failed to recover any DNA from sediments that were more than 400,000 years old? How would you test your hypotheses?
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One type of fish fossil is found only in a rock layer near the bottom of a canyon, while a different kind of fish fossil is found only in a rock layer 4,000 feet higher, near the top of the canyon. Which statement would a scientist most likely offer to explain this situation?
A.) The fish in the lower layer lived in the deep sea. While the other fish lived in shallow water.
B.) The fish in the upper layer lived a healthier life than the other fish.
C.) The rock in the lower layer is denser than the rock in the upper layer
D.) The rock in the upper layer must have formed in freshwater
E.) The fish in the upper layer lived more recently than the other fish.
The Geologic Time Scale is a systematic chronological dating process that relates geological strata to time. This methodology is commonly used be geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that once occurred in history. Which of the following statements can be…
An organism dies,and its body leaves an impression in mud. Over time, the mud hardens into rock, and the impression becomes a fossil. Which kind of fossil was formed?
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Group of answer choices
A: Cave layers in South Africa
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D: organic materials
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Chapter 19 Solutions
BIOLOGY: CONCEPTS AND INVESTIGATIONS,
Ch. 19.1 - Prob. 1MCCh. 19.1 - Prob. 2MCCh. 19.1 - How does vascular tissue adapt plants to land?Ch. 19.1 - Describe the reproductive adaptations of plants.Ch. 19.2 - Describe the three main groups of bryophytes.Ch. 19.2 - Prob. 2MCCh. 19.3 - Describe the four groups of seedless vascular...Ch. 19.3 - Prob. 2MCCh. 19.3 - Prob. 3MCCh. 19.4 - What are the characteristics of gymnosperms?
Ch. 19.4 - What are the four groups of gymnosperms?Ch. 19.4 - Prob. 3MCCh. 19.4 - What happens during and after pollination in...Ch. 19.5 - Prob. 1MCCh. 19.5 - Prob. 2MCCh. 19.5 - Prob. 3MCCh. 19.5 - Prob. 4MCCh. 19.6 - Prob. 1MCCh. 19.6 - What are some alternative hypotheses for why the...Ch. 19 - Which of the following is NOT a similarity between...Ch. 19 - Prob. 2MCQCh. 19 - What conditions did plants face when they moved to...Ch. 19 - Prob. 4MCQCh. 19 - Prob. 5MCQCh. 19 - Which adaptation to land is present in the most...Ch. 19 - Prob. 7MCQCh. 19 - Reproduction in a pine tree is associated with a....Ch. 19 - In comparing the life cycle of an angiosperm to...Ch. 19 - What plant group is correctly matched with an...Ch. 19 - What characteristics do all land plants have in...Ch. 19 - Prob. 2WIOCh. 19 - How are terrestrial habitats different from...Ch. 19 - Prob. 4WIOCh. 19 - List the characteristics that distinguish the four...Ch. 19 - Prob. 6WIOCh. 19 - A fern plant can produce as many as 50 million...Ch. 19 - How do the adaptations of gymnosperms and...Ch. 19 - Prob. 9WIOCh. 19 - Describe how the petals, ovary, and ovule of...Ch. 19 - The immature fruit of the opium poppy produces...Ch. 19 - Scientists have studied plant populations that...Ch. 19 - Prob. 13WIOCh. 19 - Prob. 14WIOCh. 19 - Prob. 15WIOCh. 19 - Compare and contrast the life cycles of the four...Ch. 19 - Prob. 17WIOCh. 19 - Prob. 18WIOCh. 19 - Prob. 19WIOCh. 19 - What are the pros and cons of pursuing biofuels as...Ch. 19 - Prob. 1PITCh. 19 - Prob. 2PITCh. 19 - Prob. 3PITCh. 19 - Prob. 4PIT
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- Why did Shubin and his colleagues choose to look in the Canadian Arctic for transitional fossils?arrow_forwardWhat is the most accepted hypothesis on the origin of life on earth? How does it compare to the other main hypotheses?arrow_forwardWhat experimentation has been done on finding the source of raw material for the first life on Earth? What has been discovered and by who?arrow_forward
- How do we know how old a fossil is? A) We compare it to current species and see how much has changed B) We see how much soil is on top of it C) We use radiometric datingarrow_forwardExplain why it is difficult to use carbon-14 dating on 100-million-year-old dinosaur fossilsarrow_forwardAccording to "Our Earliest Ancestors", why can’t scientists just do DNA analysis on these fossil hominins to determine if they are a separate species and possibly what species they belong to? A.The technology for extracting DNA from fossils hasn't been developed yet. B.Scientists can't perform DNA analysis on fossil hominins because the fossils have been contaminated with modern human DNA over the years, making it impossible to isolate the ancient genetic material. C.The fossils would need to be in a -5 degree Celsius environment to prevent DNA from degrading D.The DNA of fossil hominins is too similar to modern humans, making it difficult to distinguish between them.arrow_forward
- 9) Rocks containing fossil evidence have been found in Canada suggesting how life on Earth evolved. What about the rocks led to this belief? A) They contained graphite, a from of pure carbon. B) They contained fossil evidence of human remains. C) They were metamorphic rocks with traces of water. D) They were extrusive rocks that came from the volcanic vents. Not Gradedarrow_forwardWhich 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_forwardWhy is it so important to learn about the Piltdown Hoax? Do you think it demonstrates that scientists may lose their objectivity when they want data to fulfill their expectations and desires or does it demonstrate the self-corrective nature of science? Why were people so willing to believethat one of the oldest specimens was found in south England?arrow_forward
- How does finding the same fossils of a land animal on two different continents support the hypothesis of continental drift? A) The land animal fossil is now found in colder parts of the world which means the continents had drifted since the fossils were made. B) The land animal fossil could only have ended up fossilized on both continents if they were once together C) The land animal fossil was unable to swim across oceans so the fact that its fossils were found on distant continents suggested those continents had once been fused together as later moved apart. D) The land animal fossil wasnt found in Asia which wegner thought was only stable continent that hadn’t moved.arrow_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_forwardThe fossils in line 4 are blank the ones in line 1 of the diagram. A) much older B) much younger than C) slightly older than D) slightly younger thanarrow_forward
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