WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Question
Chapter 13, Problem 2SA
Summary Introduction
To review:
To identify the common ancestor of all animals and the reason how we know that is true.
Introduction:
Animals are organisms that share three characteristics: all of them eat other organisms, all can move during at least one stage of their development, and all are multicellular. About two-thirds of the almost two million species on earth are animal.
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The forelimbs of the organisms in Figure 1 are examples of what type of structures?
What do these structures indicate about the evolution of the three organisms?
What would be an example of a structure analogous to the last structure?
How does the anatomy of the forelimbs show an evolutionary pattern?
Draw the phylogenetic tree, label all of the living things and the traits that characterize them directly on the tree.
Living thing
Vertebrae
Bony
Skeleton
4
Limbs
Amniotic
Egg
Hair
2 post-orbital fenestrae
Amphibians
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Crocodiles
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Dinosaurs
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Primates
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+
+
-
Rays
+
+
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-
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Rodents
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+
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Sharks
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What makes Archeopteryx an important fossil evolutionarily?
This species has a mix of characters that suggest it was a "transitional" species between two large groups, dinosaurs and birds.
This species is the oldest known, universally agreed upon, fossil of life, and therefore tells up what the common ancestor to all living things might have been like.
This species is thought to be the last common ancestor between chimps and humans, and therefore is the root of our own specific group (homonins).
This species has a mix of characters that suggests is was a "transitional" species between two large groups, fish and amphibians.
Chapter 13 Solutions
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Species have traditionally been characterized as "primitive " and "advanced". For example,mosses were considered to be primitive, and flowering plants advances;crocodiles were primitive and mammals were advanced.Why do most biologist today think it is incorrect to refer to any modern species as primitive?arrow_forwardHow is it that most, if not all, of the extant animal phyla today evolved during the Cambrian period if so many massive extinction events have taken place since then?arrow_forwardHow might we know what the common ancestor of frogs and humans may have been? Where could we look for information?arrow_forward
- What is an evolutionary tree? Is there a precise evolutionary tree known by science that explains the emergence and origin of every type of living being?arrow_forwardMammals, like humans and apes, have 5 digits on their fore and hind limbs. Modern horses have 1. How might you recontrust the ancestral state of mammal tow number?a) investigate the number of toes on all extant horses and apesb) investigate the number of toes for other mammals and use parsimony to deduce the ancestral statec) investigate the number of toes for an outgroup that is closely related to mammals, for example reptiles or amphibiansd) either b or ce) all of the abovearrow_forwardFor about how many years of geological time have the dinosours existed on earth?? Did dinosours exist at the same time as humans? How do scientists determine when an era begins and when it ends? What is the purpose of making a geological timelinearrow_forward
- Based on anatomy, fossil, embryos, and DNA what are the closest living relatives of cetaceans, fish or mammals?arrow_forwardThis phylogenetic tree shows that: All of these Elephants evolved from hyraxes. Tapirs are the most highly evolved mammals in this group. Hippopotamuses are more closely related to cetaceans than they are to pigs. Pigs are the common ancestors of cetaceans and hippopotamuses.arrow_forwardSpecies have traditionally been characterized as “primitive” and “advanced.” For example, mosses were considered to be primitive, and flowering plants advanced; crocodiles were primitive and mammals were advanced. Why do most biologists of today think it is incorrect to refer to any modern species as primitive?arrow_forward
- What is convergent evolution? Use evidence from the trees to explain how the Anolis lizards are an example of this concept.arrow_forwardA new organism has been discovered! Our fictional creature, “the Snipe”, has structural similarities to a deer, pig, and beaver. It has a pig’s head with antlers, and big buck-teeth, a deer’s body, and a wide, flat tail. Please describe how you could determine its place on the evolutionary tree below. Please draw an evolutionary tree to demonstratearrow_forwardAnswer the following questions about this phylogenetic tree. What animal represents the out group in this tree and why? What is the derived characteristic of the birds? What is the shared characteristic of 3 to 6? Which number represents the common ancestor of Ostriches and Hawks?arrow_forward
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