Question 1: Mass extinction ocurred on the following time and era except for: A. Mesozoic B. Precambrian C. Paleozoic D. Cenozoic E. All of the answers are correct Question 2: Why would Precambrian Time did not have a lot of fossils? A. fossils were destroyed by extreme heat and pressure. B. soft bodied animals do not leave a lot of fossils. C. majority of the fossils during Precambrian time underwent chemical transformation D. paleontologists haven’t recovered much of the remains of ancient organisms. Question 3: Transgenic organisms have also been developed for commercial purposes most importantly in the agricultural sector. Perhaps the most famous examples are food crops like soy and corn that are now highly resistant to various types of pests. These transgenic organisms are commonly produced by: A. addition, deletion of modification of genes B. gene sequences and programming C. inducing genetic mutations D. genetic transformation by bacteria E. identifying chromosomal aberrations

Question 1: Mass extinction ocurred on the following time and era except for: A. Mesozoic B. Precambrian C. Paleozoic D. Cenozoic E. All of the answers are correct Question 2: Why would Precambrian Time did not have a lot of fossils? A. fossils were destroyed by extreme heat and pressure. B. soft bodied animals do not leave a lot of fossils. C. majority of the fossils during Precambrian time underwent chemical transformation D. paleontologists haven’t recovered much of the remains of ancient organisms. Question 3: Transgenic organisms have also been developed for commercial purposes most importantly in the agricultural sector. Perhaps the most famous examples are food crops like soy and corn that are now highly resistant to various types of pests. These transgenic organisms are commonly produced by: A. addition, deletion of modification of genes B. gene sequences and programming C. inducing genetic mutations D. genetic transformation by bacteria E. identifying chromosomal aberrations

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter18: Life's Origin And Early Evolution

Section: Chapter Questions

Problem 2SA: The first interval of Earths existence is called the ________. a. Cambrian c. Proterozoic eon b....

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QUESTION 82 Which technique did Charles Darwin use to measure the age of the Earth? A. rate of erosion of Igneous rocks in England B. rate of weathering of sandstone in sourthern England C. rate of erosion of the chalk formation in sourthern England D. rate of sedimentation of the oceans
Question: Which of the following puts the events in the history of life in the correct order? A- Permian Extinction; Tiktaalik; Pleistocene Megafaunal Extinction; Precambrian Era B- Precambrian Era; Tiktaalik; Permian Extinction; Pleistocene Megafaunal Extinction C- Pleistocene Megafaunal Extinction; Permian Extinction; Precambrian Era; Tiktaalik D- Tiktaalik; Permian Extinction; Precambrian Era; Pleistocene Megafaunal Extinction E- Precambrian Era; Permian Extinction; Tiktaalik; Pleistocene Megafaunal Extinction
Which 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 strike
QUESTION 22 Tiktaalik and Archaeopteryx are very important transitional forms. They provide evidence for evolution through examples of: a. microevolution b. macroevolution c. migration d. speciation
QUESTION 52 The most accurate phylogenies use… a. Analogous characteristics b. Evolutionary reversals c. Homologous characteristics d. Homoplastic characteristics
Scientists 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 the 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?
Which 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.
Which of the following geologic periods is not part of the Paleozoic Era? the Carboniferous Period the Cambrian Period the Cretaceous Period the Devonian Period the Ordovician Period
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. Cambrian
Which item is best dated using the potassium-argon (K-Ar) method? Group of answer choices A: Cave layers in South Africa B: stone tools C: Ancient dinosaur bones D: organic materials E: Lava flows found in the Olduvai Gorge
We live in the Cenozoic era, and scientists know more about this era and the epochs it’s divided into than any other time period. Why is this? A. We know more about the Cenozoic era because this is the only era that has had a wide diversity of species living on Earth. B. We know more about the Cenozoic era because this is the most recent time period in the history of the Earth, and we have more information available to study. C. We know more about the Cenozoic era because the planet’s poles reversed magnetic fields at the beginning of this era. D. We know more about the Cenozoic era because fossils don’t exist to document previous eras.
During the Early _______________, life consisted of prokaryotic cells, but by the end of this geologic time span, multicellular eukaryotic organisms had evolved. (a) Cenozoic era (b) Paleozoic era (c) Mesozoic era (d) Archaean eon(e) Proterozoic eon