The Cambrian Explosion occurred approximately 542 million years ago. During the Cambrian, what ‘exploded’? a. The diversity of species on Earth, including many major animal phyla that exist today b. The Yucatan Peninsula, which was hit by an asteroid c. The quantity of oxygen in the atmosphere due to the expansion of coniferous forests d. Numerous volcanoes worldwide, leading to the fourth mass extinction

The Cambrian Explosion occurred approximately 542 million years ago. During the Cambrian, what ‘exploded’? a. The diversity of species on Earth, including many major animal phyla that exist today b. The Yucatan Peninsula, which was hit by an asteroid c. The quantity of oxygen in the atmosphere due to the expansion of coniferous forests d. Numerous volcanoes worldwide, leading to the fourth mass extinction

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter16: Evidence Of Evolution

Section: Chapter Questions

Problem 5SA: In which type of rock are you more likely to find a fossil? a. basalt, a dark, fine-grained volcanic...

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The first interval of Earths existence is called the ________. a. Cambrian c. Proterozoic eon b. Hadean eon d. Archean eon
Arrange these events in order of occurrence, with 1 being the earliest and 6 the most recent: ___1 a. Earths first seas form ___2 b. origin of mitochondria ___3 c. first protocells form ___4 d. Precambrian ends ___5 e. origin of chloroplasts ___6 f. first animals appear
In which type of rock are you more likely to find a fossil? a. basalt, a dark, fine-grained volcanic rock b. limestone, composed of calcium carbonate sediments c. slate, a volcanic melted and cooled shale d. granite, which forms by crystallization of molten rock below the surface of the Earth
The fossil record (a) usually occurs in sedimentary rock (b) sometimes appears fragmentary (c) is relatively complete for tropical rainforest organisms but incomplete for aquatic organisms (d) a and b (e) a, b, and c
The term “Cambrian explosion” refers to (a) an increase in biodiversity. (b) a mass extinction. (c) an atmospheric detonation due to increasing gas concentrations. (d) an oceanic eruption caused by underwater volcanic activity.
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.
On the geologic time scale, life originated in the_____ . a. Archean c. Phanerozoic b. Proterozoic d. Cambrian
The eon comprising the Cambrian period up to the present is called the (1). It is divided into three eras: Paleozoic, Mesozoic, and Cenozoic. The Paleozoic era, first (2) appeared. Finally, the Cenozoic era is where (3), flourished, lasting up to this day.
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
Euprimates 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; Oligocene
Which 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 sediments
Which mechanism of fossil formation created a replica of an organism's original form? a natural cast b amber-preserved c permineralization d trace fossil