Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 18.3, Problem 1CYL
- describe fossil evidence of the earliest multicellular organisms and the earliest animals?
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Chapter 18 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 18.1 - describe a likely scenario for the origin of life?Ch. 18.1 - How Would the experiments result charge if oxygen...Ch. 18.1 - describe, for each step in the scenario, some...Ch. 18.2 - describe scenarios for the major evolutionary...Ch. 18.2 - Uranium-235, with a half-life of 713 million...Ch. 18.2 - State the order in which these events occurred,...Ch. 18.2 - Scientists have identified a free living bacterium...Ch. 18.3 - describe fossil evidence of the earliest...Ch. 18.3 - describe the advantages that fostered the origin...Ch. 18.3 - Prob. 3CYL
Ch. 18.4 - Can ancient DNA reveal the secrets of dinosaur...Ch. 18.4 - describe the transitions and innovations...Ch. 18.4 - Prob. 1TCCh. 18.4 - Although it may never be possible to recover DNA...Ch. 18.4 - describe the advantages gained by the first plants...Ch. 18.4 - Does the mudskippers ability to walk on land...Ch. 18.5 - explain how extinction has affected the course of...Ch. 18.5 - Scientists have cloned a number of animal species,...Ch. 18.5 - describe the likely causes of mass extinctions in...Ch. 18.6 - We might be able to more easily distinguish...Ch. 18.6 - The unexpected discovery that humans interbred...Ch. 18.6 - describe the evolutionary history of humans and...Ch. 18.6 - Paleontologists recently discovered fossil...Ch. 18.6 - name and describe some characteristics of the...Ch. 18.6 - describe the key features of the most recent phase...Ch. 18 - Extinctions have occurred throughout the history...Ch. 18 - Because there was no oxygen in the earliest...Ch. 18 - Almost all of the oxygen gas in todays atmosphere...Ch. 18 - What is the evidence that life might have...Ch. 18 - In biological terms, what do you think was the...Ch. 18 - The molecule _________ became a candidate for the...Ch. 18 - Extinction a. generally does not occur except...Ch. 18 - How did the origin of photosynthesis affect...Ch. 18 - Complex cells that contain a nucleus and other...Ch. 18 - In the endosymbiotic origin of the mitochondrion,...Ch. 18 - Explain the endosymbiont hypothesis for the origin...Ch. 18 - The Sperm of early land plants had to reach the...Ch. 18 - Which of the following does not list evolutionary...Ch. 18 - Name two advantages of multicellularity for plants...Ch. 18 - Prob. 5FIBCh. 18 - Prob. 5MCCh. 18 - What advantages and disadvantages would...Ch. 18 - Prob. 6FIBCh. 18 - Prob. 6RQCh. 18 - Prob. 7FIBCh. 18 - Prob. 7RQ
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- What is the correct order of appearance in the fossil record, starting with the earliest: eukaryotic cells, multicellular organisms, prokaryotic cells?arrow_forwardWhat are the largest animals ever to have lived on Earth? From what animals are they thought to have evolved?arrow_forwardIn which probable stage of physical and chemical evolution of life were gaseous oxygen and water also present?arrow_forward
- what do fossils tell us about the evolutionary history of the animal kingdom?arrow_forwardWhat patterns in the fossil record would support that organisms have evolved?arrow_forwardBased on anatomy, fossil, embryos, and DNA what are the closest living relatives of cetaceans, fish or mammals?arrow_forward
- Do plants and animals have a common multicellular ancestor?arrow_forwardWhich of the following is an example of an animal that has true tissues, has a coelom, is triploblastic, and is a Deuterstome? Question 8 options: a) Echinodermata and Chordata b) Cnidaria c) Ctenophora d) Placozoaarrow_forwardWhich of the following is the most likely organism to fossilize and be found in the fossil record? The earliest forms of bacteria A jellyfish with a soft body An octopus with a soft body A crustacean with a hard exoskeletonarrow_forward
- How did the researchers use the DNA of living sponges to make conclusions about events occurring hundreds of millions of years ago?arrow_forwardWhich of the following statements regarding the diversification of animals is supported by the current available evidence? a) most animals belong to the clade Bilateria b) sponges are a paraphyletic group of organisms c) ctenophores are basal metazoans d) animals descended from multiple ancestorsarrow_forwardThe time of greatest evolutionary diversification in the history of life occurred during the (a) Cambrian period (b) Ordovician period (c) Silurian period (d) Carboniferous period (e) Permian periodarrow_forward
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