Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 27, Problem 13RQ
Which of the following periods is the earliest during which animals may have appeared?
- Ordovician period
- Cambrian period
- Ediacaran period
- Cryogenian period
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According to Scottish geologist Charles Lyell, the Cenozoic Era (including the Eocene, Miocene, and Pliocene epochs) extended over which of the following time periods in the fossil record?
the Paleozoic Era, from the start of the Cambrian into the Permian Period
the “age of reptiles”, from 252 million years ago to 66 million years ago
the “age of birds and mammals”, from 66 million years ago to the present day
the “age of fishes”, from 541 million years ago to 252 million years ago
the Mesozoic Era, from the start of the Triassic into the Cretaceous Period
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
The “age of fishes”, which began with the Cambrian Period (about 541 million years ago), and ended with the Permian/Triassic extinction event (about 252 million years ago), is also known as:
the Mesozoic Era
the “age of birds and mammals”
the Cenozoic Era
the “age of reptiles”
the Paleozoic Era
Chapter 27 Solutions
Biology 2e
Ch. 27 - Figure 27.5 If a Hox 13 gene in a mouse was...Ch. 27 - Figure 27.6 Which of the following statements is...Ch. 27 - Figure 27.9 Which of the following statements...Ch. 27 - Which of the following is not a feature common to...Ch. 27 - During embryonic development, unique cell layers...Ch. 27 - Which of the following phenotypes would most...Ch. 27 - Which of the following organisms is most likely to...Ch. 27 - Which of the following is not possible? radially...Ch. 27 - An animal whose development is marked by radial...Ch. 27 - Consulting the modern phylogenetic tree of...
Ch. 27 - Which of the following is thought to be the most...Ch. 27 - As with the emergence of the Acoelomorpha phylum,...Ch. 27 - Which of the following periods is the earliest...Ch. 27 - What type of data is primarily used to determine...Ch. 27 - The time between 542-488 million years ago marks...Ch. 27 - Until recent discoveries suggested otherwise,...Ch. 27 - Plant life first appeared on land during which of...Ch. 27 - Approximately how many mass extinction events...Ch. 27 - Why might the evolution of specialized tissues be...Ch. 27 - Describe and give examples of how humans display...Ch. 27 - How have Hox genes contributed to the diversity of...Ch. 27 - Using the following terms, explain what...Ch. 27 - Explain some of the advantages brought about...Ch. 27 - Describe at least two major changes to the animal...Ch. 27 - How is it that morphological data alone might lead...Ch. 27 - Briefly describe at least two theories that...Ch. 27 - How is it that most if not all, of the extant...
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- There was a large proliferation of fossils showing increase in diversity of life.What period is this?arrow_forwardDraw a line above the geologic time scale below to mark the age range for each cladearrow_forwardThe largest and most deadly of all Mass Extinctions in the history of Earth came at the end of the Period, when only 5% of the existing species survived. Nobody knows exactly what caused this event, so it remains a mystery to this day. Quaternary Devonian Ordovician Permianarrow_forward
- Which of the following was not present by the end of Precambrian? a. archaea c. fungi b. bacteria d. fisharrow_forwardThe first interval of Earths existence is called the ________. a. Cambrian c. Proterozoic eon b. Hadean eon d. Archean eonarrow_forwardA great adaptive radiation of animals that occurred during the _______ gave rise to modern animal lineages. a. Precambrian c. Cambrian b. Ediacaran d. Jurassicarrow_forward
- Cartilaginous fishes made their first appearance in the fossil record between 444 and 419 MYA, which represents the starting and ending dates for the Carboniferous Period which represents the starting and ending dates for the Silurian Period which represents the starting and ending dates for the Cambrian Period which represents the starting and ending dates for the Jurassic Period which represents the starting and ending dates for the Devonian Periodarrow_forwardDuring which geologic eon was the Earth first colonized by living organisms? the Phanerozoic Eon the Proterozoic Eon the Archaean Eon the Hadean Eon none of the abovearrow_forwardGiven the life-style we live today, what pre-historic period gives us the ability to heat our homes, run our cars and have a comfortable life Group of answer choices Jurassic neogene carboniferous Cambrianarrow_forward
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