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In the past 500 million years there have been ________ mass extinction events.
A. |
two
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B. |
three
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C. |
five
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|
D. |
seven
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E. |
ten |
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- The 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 migrationEuprimates 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; OligoceneAn adaptive radiation is________. a. a burst of speciation b. a healthy level of UV radiation c. a hypothesized cause of a mass extinction d. evidence of an asteroid impact
- Which of the following contributed to mass extinctions?a. climate changeb. continental driftc. meteor impactsd. All of these are correct.Which of these geologic time periods have been defined by a major extinction event? Select all that apply. A. Permian B. Jurassic C. Quaternary D. Cretaceous E. CambrianThe most severe mass extinction event, linked to the formation of Pangaea and massive volcanic eruptions, occurred at the end of the _______ period. Group of answer choices a Devonian b Triassic c Cretaceous d Ordovician e Permian People value biodiversity for all of the following reasons except a food, fiber, and medicine. b the acceptance that extinctions are part of a natural process. c opportunities to study and understand the world they live in. d aesthetic pleasure from interacting with other organisms. e functioning of ecosystems and the benefits they provide.
- Look at the upper right side of this diagram of the phylogenic tree. What does it suggest has happened? O A. a mass extinction event B. convergent evolution O C. Genetic bottleneck O D. adaptive radiation A Moving to another question will save this response. ere to searchWhich 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 strikeThis tropical area that existed 37-29mya provided was home to many various species, including several primate species, including Parapithecus. a.Rukwa Rift Basin b.Hubei Province c. Fayum
- On the geologic time scale, life originated in the_____ . a. Archean c. Phanerozoic b. Proterozoic d. CambrianWhich 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.Approximately when did life first appear on land A. 500 million years ago B. 2 billion years ago C. 700 million years D. 1.5 million years ago
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