Did whales evolve from hippos? See Section 25.1 (Page 497) . No, but they both share a recent common ancestor.
- 1 Did whales evolve from hippos quizlet?
- 2 Which is the best definition of adaptive radiation see Section 25.3 page 507?
- 3 What is the leading hypothesis on why humans evolved such large brains see Section 32.4 page 663?
- 4 Why do mass extinctions wipe out species more or less randomly see Section 25.4 page?
- 5 Are all the theropod dinosaurs extinct?
- 6 What is the leading hypothesis on why humans evolved such large brains?
- 7 Are all theropod dinosaurs extinct quizlet?
- 8 Where would the origin of endothermy map on the phylogeny see Section 32.4 page?
- 9 What was the adaptive significance of the amniote egg see Section 32.4 page?
- 10 Why did Kingsley and his team cross marine and freshwater sticklebacks?
- 11 How do lizard species on mainland California compare in diversity to those found on islands See section 25.3 page?
- 12 Why do mass extinctions wipe out species more or less randomly?
- 13 Which evidence is consistent with the asteroid impact hypothesis?
- 14 When unrelated species evolve similar characteristics?
- 15 How can mass extinction events be distinguished from background extinctions see Section 25.4 page?
- 16 What is genetic drift Chapter 24?
- 17 Which is true of Archaea?
- 18 Did pterosaurs have teeth?
- 19 Which tree shows the most recent common ancestor of Sample 1 and Atlantic salmon?
- 20 Is T Rex a theropod?
- 21 Where did theropods evolve from?
- 22 Did chimpanzees evolve humans?
- 23 Why do scientists believe that the neocortex evolved?
- 24 Has the brain evolved over time?
- 25 Where would the origin of Endothermy map on the phylogeny?
- 26 Where should the origin of jointed appendages be placed on the phylogenetic tree?
- 27 What is the significance of the amniotic egg quizlet?
- 28 What is the significance of the amniotic egg what characteristics make reptiles less dependent on a source of external water?
- 29 Why does a stickleback have 3 spins?
- 30 What trait’s define s the vertebrates?
- 31 What is the leading hypothesis on why humans evolved such large brains see Section 32.4 page 663?
- 32 How did sticklebacks change as the adapted to life in post glacial lakes?
- 33 What is mutated in Pitx1 in freshwater sticklebacks?
- 34 Are all the theropod dinosaurs extinct?
- 35 What types of animals survived after the asteroid impact?
- 36 How does continental drift affect living organisms See Concept 25.4 page?
- 37 Is extensive loss of hair observed in humans and whales an example of homoplasy or homology see Section 25.1 page?
- 38 How many times has the earth been destroyed?
- 39 Can humans survive mass extinction?
- 40 Do dolphins and sharks have a common ancestor?
- 41 Are sharks and dolphins an example of convergent evolution?
- 42 How did Ediacaran animals differ from Cambrian animals?
- 43 How can mass extinctions be distinguished from background extinctions?
- 44 Why are the large finches now living on the Galápagos Islands?
- 45 How long does it take new species to form on Earth?
- 46 Are protists a Kingdom?
- 47 Is Murein a peptidoglycan?
- 48 Did pterosaurs have teeth?
- 49 Is Therizinosaurus a theropod?
- 50 Did pterosaurs evolve into birds?
- 51 Why did pterosaurs go extinct?
Did whales evolve from hippos quizlet?
Did whales evolve from hippos? No, but they both share a recent common ancestor.
Which is the best definition of adaptive radiation see Section 25.3 page 507?
Which is the best definition of adaptive radiation? See Section 25.3 ( page 507) . An adaptive radiation occurs when a single lineage produces many ecologically diverse descendant species in a relatively short period of time.
What is the leading hypothesis on why humans evolved such large brains see Section 32.4 page 663?
What is the leading hypothesis on why humans evolved such large brains? See Section 32.4 (Page 663). They evolved because of competition with apes. They evolved because of spoken language and tool use.
Why do mass extinctions wipe out species more or less randomly see Section 25.4 page?
Why do mass extinctions wipe out species more or less randomly? See Section 25.4 (Page 512) . They are caused by exceptionally harsh, short-term conditions.
Are all the theropod dinosaurs extinct?
Answer and Explanation: Yes, all of the theropod dinosaurs are extinct, having died out 65 million years ago when a giant meteor collided with Earth.
What is the leading hypothesis on why humans evolved such large brains?
What is the leading hypothesis on why humans evolving such large brains was beneficial? They evolved because of spoken language and tool use. *This hypothesis suggests that increased language and tool use increased selection for the capacity to reason and communicate, which favored large brains.
Are all theropod dinosaurs extinct quizlet?
Are all the theropod dinosaurs extinct? No, theropods are a monophyletic group that includes birds.
Where would the origin of endothermy map on the phylogeny see Section 32.4 page?
Where would the origin of endothermy map on the phylogeny? See Section 32.4 ( page 663) . Within Mammalia and within Aves. What was the adaptive significance of jaws?
What was the adaptive significance of the amniote egg see Section 32.4 page?
What was the adaptive significance of the amniote egg? See Section 32.4 (Page 663) . It allows reproduction on land. What trait(s) define(s) the vertebrates?
Why did Kingsley and his team cross marine and freshwater sticklebacks?
Why did Kingsley and his team cross marine and freshwater sticklebacks? To find the location of the gene(s) causing the difference between stickleback populations with and without spines. (Geneticists use crosses to map the location of genes.)
How do lizard species on mainland California compare in diversity to those found on islands See section 25.3 page?
How do lizard species on mainland California compare in diversity to those found on islands? Due to more open ecological opportunities on a given island, greater differences occur between island species.
Why do mass extinctions wipe out species more or less randomly?
Why do mass extinctions wipe out species more or less randomly? They are caused by exceptionally harsh, short-term conditions. How can mass extinction events be distinguished from background extinctions?
Which evidence is consistent with the asteroid impact hypothesis?
Which evidence is consistent with the asteroid impact hypothesis? The energy from an iridium-rich asteroid impact melted and transformed rock and ejected the material at varying distances from the impact site.
Convergent evolution is when different organisms independently evolve similar traits. For example, sharks and dolphins look relatively similar despite being entirely unrelated.
How can mass extinction events be distinguished from background extinctions see Section 25.4 page?
How can mass extinction events be distinguished from background extinctions? A mass extinction occurs when at least 60 percent of species are wiped out within 1 million years. You just studied 5 terms!
What is genetic drift Chapter 24?
What is genetic drift? A change in allele frequencies caused by random events.
Which is true of Archaea?
Which is true of archaea? They contain many documented human pathogens. They have unique ether-linked lipids in their plasma membranes. They are the only prokaryotic organisms.
Did pterosaurs have teeth?
Despite their formidable size, the pterosaurs in the Azhdarchidae family had no teeth. The new research suggests they replaced their toothed relatives as the dominant species when high levels of carbon dioxide killed off important microscopic marine creatures, leading to a mass extinction about 90 million years ago.
Which tree shows the most recent common ancestor of Sample 1 and Atlantic salmon?
Which tree shows the most recent common ancestor of Sample 1 and Sockeye salmon? Given the data in this phylogenetic tree, what is the most likely source of Sample 1? Atlantic salmon, because Sample 1 shares a more recent common ancestor with Atlantic salmon than with other salmon.
Is T Rex a theropod?
T. rex was a theropod (the group of predominantly meat-eating dinosaurs) that could reach up to 12 m (or 40 feet) in length and could have weighed as much as 8 metric tons, which is much more than an African Elephant bull!
Where did theropods evolve from?
Theropods first appeared during the Carnian age of the late Triassic period 231.4 million years ago (Ma) and included all the large terrestrial carnivores from the Early Jurassic until at least the close of the Cretaceous, about 66 Ma.
Did chimpanzees evolve humans?
Humans are one type of several living species of great apes. Humans evolved alongside orangutans, chimpanzees, bonobos, and gorillas. All of these share a common ancestor before about 7 million years ago. Learn more about apes.
Why do scientists believe that the neocortex evolved?
Many scientists believe that this growth in the primates’ neocortex reflects the growing complexity of their social lives. Indeed, the ability to predict the behaviour of other individuals within a group seems to have conferred a large evolutionary advantage.
Has the brain evolved over time?
Over time, brains have evolved. The brains of vertebrate? animals have developed in both size and sophistication. Humans have the largest brain in proportion to their body size of any living creatures, but also the most complex.
Where would the origin of Endothermy map on the phylogeny?
Where would the origin of endothermy map on the phylogeny? Within Mammalia and within Aves.
Where should the origin of jointed appendages be placed on the phylogenetic tree?
Where should the origin of jointed appendages be placed on the phylogenetic tree? Where should the origin of segmented limbs be placed on the phylogenetic tree? At the base of the clade that contains the Tardigrada, Onychophora, and Arthropoda.
What is the significance of the amniotic egg quizlet?
An amniotic egg shell is semi-permeable. This means that gases such as oxygen and carbon dioxide are able to pass through the shell, but water is held inside to prevent the embryo from drying out. The development of the amniotic egg was an important adaptation, because it allowed amniotes to reproduce on land.
What is the significance of the amniotic egg what characteristics make reptiles less dependent on a source of external water?
The evolution of amniotic membranes meant that the embryos of amniotes were now provided with their own aquatic environment, which led to less dependence on water for development, allowing the amniotes to branch out into drier environments.
Why does a stickleback have 3 spins?
The three-spined stickleback (Gasterosteus aculeatus) is a small teleost fish that is ubiquitous across the Northern Hemisphere. Among the behaviours that have been characterised in this species is ritualized courtship, aggressiveness and parental behaviour.
What trait’s define s the vertebrates?
Vertebrates are differentiated by having a vertebral column. As chordates, all vertebrates have a similar anatomy and morphology with the same qualifying characteristics: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.
What is the leading hypothesis on why humans evolved such large brains see Section 32.4 page 663?
What is the leading hypothesis on why humans evolved such large brains? See Section 32.4 (Page 663). They evolved because of competition with apes. They evolved because of spoken language and tool use.
How did sticklebacks change as the adapted to life in post glacial lakes?
[CARROLL:] Stickleback bodies changed in many ways as they adapted to life in post- glacial lakes. They got smaller, their coloring changed, and most strikingly, even their skeletons changed.
What is mutated in Pitx1 in freshwater sticklebacks?
Mike Shapiro, PhD, a postdoctoral scholar and co-first author, found that a gene located at that region is the stickleback version of a gene in mice called Pitx1 that, when mutated, causes mice to have greatly reduced hind limbs. These mice often have asymmetric limb and pelvic reductions, much like the sticklebacks.
Are all the theropod dinosaurs extinct?
Answer and Explanation: Yes, all of the theropod dinosaurs are extinct, having died out 65 million years ago when a giant meteor collided with Earth.
What types of animals survived after the asteroid impact?
Birds: Birds are the only dinosaurs to survive the mass extinction event 65 million years ago. Frogs & Salamanders: These seemingly delicate amphibians survived the extinction that wiped out larger animals.
How does continental drift affect living organisms See Concept 25.4 page?
How does continental drift affect living organisms? It causes climate change, which puts selective pressure on organisms. It causes changes in habitats, such as when large amounts of shallow marine habitat were lost in the formation of Pangaea.
Is extensive loss of hair observed in humans and whales an example of homoplasy or homology see Section 25.1 page?
Is extensive loss of hair observed in humans and whales an example of homoplasy or homology? See Section 25.1. This is homoplasy since whales and humans, who are not closely related, evolved this feature separately by convergent evolution.
How many times has the earth been destroyed?
In the last half-billion years, life on Earth has been nearly wiped out five times—by such things as climate change, an intense ice age, volcanoes, and that space rock that smashed into the Gulf of Mexico 65 million years ago, obliterating the dinosaurs and a bunch of other species.
Can humans survive mass extinction?
We’re so uniquely adaptable, we might even survive a mass extinction event. Given a decade of warning before an asteroid strike, humans could probably stockpile enough food to survive years of cold and darkness, saving much or most of the population.
Do dolphins and sharks have a common ancestor?
We know that dolphins and sharks are not closely related, and they didn’t inherit their similar body shapes from a common ancestor. Their streamlined bodies, dorsal fins and flippers are the result of convergent evolution.
Are sharks and dolphins an example of convergent evolution?
Dolphins and sharks are examples of convergent evolution because they have no recent common ancestors, and yet their bodies have similar shapes.
How did Ediacaran animals differ from Cambrian animals?
How did Ediacaran animals differ from Cambrian animals? See Section 25.3 ( page 507) . Ediacaran animals lacked shells, limbs, heads, and feeding appendages.
How can mass extinctions be distinguished from background extinctions?
Background extinction tends to be slow and gradual but common with a small percentage of species at any given time fading into extinction across Earth’s history. Mass extinction involves the death of 75% or more of species in a geologically short period of time due to catastrophic events.
Why are the large finches now living on the Galápagos Islands?
Why are the large finches now living on the Galápagos Islands different from the original source population from a nearby island? Natural selection favored individuals that were more fit in the new environment.
How long does it take new species to form on Earth?
Their analysis suggests that speciation is essentially random. No matter what the life form — plant or animal, insect or mammal — it takes about 2 million years for a new species to form. Random genetic events, not natural selection, play the main role in speciation.
Are protists a Kingdom?
Protists are a group of all the eukaryotes that are not fungi, animals, or plants. As a result, it is a very diverse group of organisms. The eukaryotes that make up this kingdom, Kingdom Protista, do not have much in common besides a relatively simple organization. Protists can look very different from each other.
Is Murein a peptidoglycan?
Peptidoglycan or murein is a polymer consisting of sugars and amino acids that forms a mesh-like peptidoglycan layer outside the plasma membrane of most bacteria, forming the cell wall.
Did pterosaurs have teeth?
Despite their formidable size, the pterosaurs in the Azhdarchidae family had no teeth. The new research suggests they replaced their toothed relatives as the dominant species when high levels of carbon dioxide killed off important microscopic marine creatures, leading to a mass extinction about 90 million years ago.
Is Therizinosaurus a theropod?
therizinosaur, group of theropod dinosaurs that lived during the Late Cretaceous (roughly 100 million to 66 million years ago) in Asia and North America and were characterized by their relatively small skulls, leaf-shaped teeth, and extended fingers with extremely long and robust claws.
Did pterosaurs evolve into birds?
Pterosaurs were the first vertebrate animals to evolve powered flight—nearly 80 million years before birds. Over their long reign they evolved some of the most extreme adaptations of any animal.
Why did pterosaurs go extinct?
At the end of the Cretaceous period 65 million years ago, a meteorite or comet slammed into Earth. That calamity—and other events—wiped out roughly three-quarters of all animal species, including all remaining pterosaurs and dinosaurs.