Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 15, Problem 2PIT
Refer to figure 15.31 and the chapter content to answer the following questions.
2. Arrange the 14 major events at the bottom of the concept map in chronological order; indicate when the major extinction events occurred. What was the implication of each extinction?
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According to Figure 2 above, how many extinction events contributed to the end-Ordovician mass extinction and when did they occur?
The graph below shows the population of three different families of marine organisms along five different mass extinction events. Each colour on the graph represents a family of organisms, and the Y axis shows how many species belong to that family.
a. What stage of population growth is displayed at point ‘0’ on the graph above?
b. The Extinction Event that occurred at point 3 was particularly significant. Using the graph, explain how this event impacted each marine family.
c. The extinction events mapped above had significant impact on marine life. What type of event could have a similar impact on the human population?
please explain
A drawback of the time hypothesis to explain the variation in species richness is that
1. Cannot account for algal diversity.
2. Fossils do not preserve well in the oceans.
3. Geological activity may interfere with species richness measurements.
4. It is not applicable to marine ecosystems because there was no glaciation in oceans.
5. Humans significantly modified marine environments.
Chapter 15 Solutions
Biology: Concepts and Investigations
Ch. 15.1 - How were conditions on Earth before life began...Ch. 15.1 - Prob. 2MCCh. 15.1 - Prob. 3MCCh. 15.1 - Prob. 4MCCh. 15.2 - How might the endoplasmic reticulum, nuclear...Ch. 15.2 - Prob. 2MCCh. 15.2 - Prob. 3MCCh. 15.3 - Prob. 1MCCh. 15.3 - What types of organisms flourished in the...Ch. 15.3 - How did Palaeozoic life diversify during the...
Ch. 15.3 - Prob. 4MCCh. 15.3 - Prob. 5MCCh. 15.3 - Prob. 6MCCh. 15.4 - Prob. 1MCCh. 15.4 - Prob. 2MCCh. 15.4 - Prob. 3MCCh. 15.4 - Prob. 4MCCh. 15.5 - Prob. 1MCCh. 15.5 - Prob. 2MCCh. 15 - Place the following events in Earths history in...Ch. 15 - Prob. 2MCQCh. 15 - Photosynthetic cells affected early Earth by a....Ch. 15 - Prob. 4MCQCh. 15 - Prob. 5MCQCh. 15 - Prob. 6MCQCh. 15 - Why was the Mesozoic era extinction significant to...Ch. 15 - Primates share all of the following...Ch. 15 - Prob. 9MCQCh. 15 - DNA evidence suggests that modern humans a. share...Ch. 15 - Explain how the origin of self-replicating...Ch. 15 - Prob. 2WIOCh. 15 - Review the structures of nucleic acids and...Ch. 15 - Prob. 4WIOCh. 15 - The amoeba Pelomyxa palustris is a single-celled...Ch. 15 - Prob. 6WIOCh. 15 - Distinguish among the terms primate, hominid,...Ch. 15 - Prob. 8WIOCh. 15 - Prob. 9WIOCh. 15 - Compare todays changing culture to biological...Ch. 15 - Prob. 11WIOCh. 15 - Prob. 1PITCh. 15 - Refer to figure 15.31 and the chapter content to...Ch. 15 - Refer to figure 15.31 and the chapter content to...
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- A. How old is the Earth? B. How long did the longest eon (so far) last? C. How many years ago did the most recent epoch begin? D. How many mass extinction events has the Earth witnessed so far?arrow_forwardTo describe: The reason behind the history's largest waves of extinction.arrow_forward(A) What is extinction? How extinction is different from expiration? Explain. (B)List the five mass extinction episodes occurred in the history of Earth. Characterize the nature and extent of each extinction episode.arrow_forward
- What are some of the hypothesized causes of Earth’s biggest mass extinctions?arrow_forwardThe ends of many eras and periods in the geologic time scale are characterized by mass extinction. These events are triggered by different causes, but all are observed by the disappearance of (1) species in the succeeding rock strata. Write the answer for #1arrow_forwardCreate a Venn Diagram comparing and contrasting rapid and gradual mass extinction (make sure to include examples of each)arrow_forward
- Give two lines of evidence supporting the asteroid impact hypothesis for the Cretaceous extinctions.arrow_forwardCompare and contrast the multiregional and replacement models for human origins in the table below. If you are struggling with this, see the PowerPoint on the origins and dispersal of modern humans and review the tutorial: https://www2.palomar.edu/anthro/homo2/mod_homo_4.htm Multiregional Model Replacement Main argument of this model Evidence that supports this model Based on the evidence, which model of human origins is best supported?arrow_forwardScientists are examining the possible role of a large asteroid in the Cretaceous mass extinction event. A large asteroid strike would likely have caused rapid climate cooling and diffusion of sunlight. Which of the following statements are the best null and alternative hypotheses when scientists look at the geologic evidence of extinction related to the asteroid strike? Null: The rate of extinction would be steady over the entire length of time the climate was altered. Alternative: The rate of extinction would be greatest immediately before the asteroid strike. Null: The rate of extinction would gradually decrease over the entire length of time the climate was altered. Alternative: The rate of extinction would be at its lowest immediately after the asteroid strike. Null: The rate of extinction would be steady over the entire length of time the climate was altered. Alternative: The rate of extinction would be greatest immediately after the asteroid strike. Null: The rate of…arrow_forward
- WHAT IS MASS EXTINCTION? HOW DID MASS EXTINCTION EVENTS INFLUENCE EARTH'S HISTORY?arrow_forwardIf a sixth extinction event is occurring, how is it similar or different from the previous five mass extinctions? What sort of evidence do you think scientists look for to determine whether we are living through a mass extinction?arrow_forwarda. are we amidst an extinction right now ? why b. is it a mass or background extinction,arrow_forward
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