A) lancelets B) adult tunicates C) amphibians D) reptiles E) chondrichthyans A 4 At least one of these has been found in all species of eumetazoan animals studied thus far. Komodo dragons come from a group of therapod dinosaurs called carnosaurs. Biology, Biological Diversity, Vertebrates, Reptiles | VIVA Open They have a plasma membrane, cytoplasm, ribosomes, mitochondria RNA and DNA. That's the same group that Tyrannosaurus rex belonged to, althou. Immunity that is genetically determined and present at birth is called immunity. C. prokaryotes. Which of the following is most closely related to crocodiles? Still, over the decades researchers who doubted the dinosaur-bird link also made good anatomical arguments. Today there are more than 5300 mammal species alive on Earth! Somehow, mammals managed to live, thrive, and establish themselves as the dominant species on the planet. a) parakeets b) spiders c) snakes d) earthworms e) meerkats, Which of the following is considered an invasive species? a. lanugo hairs b. Each pouch gives rise to a single external gill filament in fishes and some aquatic amphibians, such as newts and salamanders. D) It contains the instructions for protein synthesis. Mammals evolved from early mammal-like reptiles during the Mesozoic Era (252-66 million years ago). nipple drinking milk, At one stage of early development, you were shaped like a hollow Aside from minor differences in the shape of neck vertebrae and the relative length of the arms, early birds and their Maniraptoran kin, such as Velociraptor, look very much alike. If the rod is to remain in the position shown, determine the maximum allowable acceleration of the system. Zhang's diligence paid off in 2009 when he pinpointed melanosomes in Confuciusornis that contained eumelanin, which gives feathers a gray or black tinge, and pheomelanin, which gives them a chestnut to reddish-brown color. Today, it's clear that feathers perform many functions: they help birds retain body heat, repel water and attract a mate. There are four main groups of land vertebrates: amphibians, reptiles, birds, and mammals. Small mammals (including primates the size of shrews) were, on the other hand, living at the period of the dinosaurs. Ichthyosaurus Facts. B. Cervix. Which Extant Animals Descended Directly From Dinosaurs? b. RNA carries out protein synthesis and DNA directs protein synthesis. 5 animals with prehistoric ancestors | Articles | CBC Kids in some sharks), and the young hatch from the egg while it is still They are diploid. a. lizards e. tuataras C. snakes d. birds b. crocodiles 26. Birds, which are classified as members of the class Aves, are comprised of more than 10,400 extant species. Overall, the similarities between these two groups indicate that they are closely related. Early amphibians were mostly large aquatic predators with razor-sharp teeth. Additionally, bipedalism would have freed up the arms for tasks such as carrying food or tools. "If Archaeopteryx were discovered today, I don't think you would call it a bird. Our experts can answer your tough homework and study questions. It was in 1995 that Zhou and colleagues announced the discovery of a fossil from this prehistoric disaster zone that heralded a new age of paleontology. A seam splits a russet-colored fish in half, producing mirror impressions of delicate fins and bones as thin as human hairs. Fun Fact. The fossils finally have confirmed, to all but a few skeptics, that birds descended from dinosaurs and are the living representatives of a dinosaur lineage called the Maniraptorans. "Sensational." Vertebrates and tunicates (sea squirts, Urochordata) share, a notochord and a dorsal, hollow nerve cord, Some animals that lived 530 mya resembled lancelets but had a brain Crocodiles Pixabay is a great source of images. Transcription B. While lizards, crocodiles, snakes, and tuataras are all reptiles and share a common ancestor with dinosaurs, they did not evolve directly from dinosaurs. Which of the following options is correct? Litter Size. The sites of protein synthesis are the mitochondria of cells b. The skin and central nervous system develop from, In deuterostomes the blastopore develops into the. Vivid evidence for that theory appeared when scientists unveiled the true colors of 125-million-year-old feathers. A) maltase B) aminopeptidase C) lactase D) all of these E) none of these. A. cytosine, uracil, adenine, thymine B. Thymine, guanine, uracil, adenine C. adenine, cytosine, guanine, thymine, Which of the following creates primary protein structure? They share a common ancestor, and both animal groups have many characteristics. be called a vertebrate. Which of the following are the only extant animals that descended directly from dinosaurs? Terms of Use What type of immunity exists even in the absence of a stimulus? To the contrary, birds are generally considered to be one of the few animals alive today that are direct descendants of dinosaurs, according to popular belief. All other trademarks and copyrights are the property of their respective owners. (a) protein (b) fat (c) carbohydrate (d) nucleic acid (e) None of these. Which of the following is true about gametes? Some reptiles, such as snakes and lizards, have lost their limbs throughout evolution. E. None of the above. Become a Study.com member to unlock this answer! Just when did dinosaurs evolve into birds? 2003-2023 Chegg Inc. All rights reserved. This is made possible by the amniotic egg, which contains several membranes that protect the developing embryo from dehydration. Show transcribed image text Expert Answer 100% (7 ratings) B. Moreover, the posited link seemed contrary to what everyone thought they knew: that birds are small, intelligent, speedy, warmblooded sprites, whereas dinosaursfrom the Greek for "fearfully great lizard"were coldblooded, dull, plodding, reptile-like creatures. d. a fish in the ocean moving toward shallower waters to warm up. QUESTION 25 Which of the following are the only extant animals descended directly fromdinosaurs? If fertilization occurs, it takes place within _______ structure. the endothermic metabolism, the unique respiratory system, the beak, and the oviparity of the bird. Oviraptors tucked their legs into the center of the clutch and hugged the periphery with their long forelimbsa posture bearing an uncanny resemblance to brooding birds keeping their eggs warm. Maybe feathers helped them scramble up tree trunks," Carrano says. What is a genetic mutation simple definition?. Amino acid hormones are mostly derived from the amino acid: a) methionine b) tyrosine c) leucine d) valine e) phenylalanine. Zhou, who works at the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences in Beijing, believed that the extraordinary bone beds in Liaoning might fill in some of the many blanks in the fossil record of the earliest birds. Its a beak without any teeth. One of China's star paleontologists, Zhou Zhonghe, smiles. Ribosomes ________. Which of the following are the only extant animals that descended A. Sinosauropteryx, in fact, was what paleontologists call a non-avian dinosaur, even though it had feathers. Which extant chordates are postulated to be most like the earliest chordates in appearance? It allows deposition of eggs in a terrestrial environment. Small mammals (including primates the size of shrews) were, on the other hand, living at the period of the dinosaurs. The region has also yielded stunning dinosaur specimens, the likes of which had never been seen before. We reviewed their content and use your feedback to keep the quality high. C) embryogenesis. In other amphibians, such as frogs and salamanders, the gills are internalized but remain connected to the outside environment through openings in the sides of the head. All these feather types have been found in fossil impressions of theropods, the dinosaur suborder that includes Tyrannosaurus rex as well as birds and other Maniraptorans. Which of the following are the only extant animals that descended c. lymph nodes. B lymphocytes C. Both T cells and B cells. Which of the following options is correct? d. Bacterial cells dry out. See what palaeontologists study. Many theories exist about which traits appeared first and how this divergence occurred. c. exotic species However, its also possible that this creature breathed through its skin instead. which of the following are the only extant animals that descended directly from dinosaurs/ a. birds b. lizards c. crocodiles d. snakes . deuterostomes 6 Jaws first occurred in which extant group of fishes? a. surface barriers b. cells and proteins of adaptive immunity c. cells and proteins of innate immunity d. all of the above, Which of the following types of hair is generally not found on bald men? These hominids lived in Europe along with Homo sapiens. (b) Thymine. (a) Conception (b) Fertilization (c) Development (d) Pregnancy. Strictly speaking, birds are the only direct descendants of the giant, extinct dinosaurs, and crocodiles and alligators are close relatives. B. Placoderm C. emu D. Lucy and more. D. Clitoris. Which of the following are the only extant animals that descended directly from dinosaurs? And modern birds, unlike their Maniraptoran ancestors, have a big toe that juts away from the other toes, which allows birds to perch. The gradual modification of anatomical structures during the period from conception to maturity is called ______. 199.101 REPTILES Flashcards | Quizlet Which of the following organisms are most closely related to humans? The animal's feathers had patches of white, black and orange-brown coloring. Well, for one thing, this ancestor was almost certainly a vertebrate. What are the only extant animals that descended directly from dinosaurs? c. vitamins. An enlarged brain was relative to body size (a trait known as encephalization). (a) Digestive enzymes (b) Mitochondria (c) DNA (d) Microtubules. a. auto b. natural passive c. active d. passive e. innate, Regarding the yolk sac, which one of the following statements is correct: a) It is derived from ectoderm during gastrulation b) At birth, it is the largest extraembryonic membrane c) The embryo's first blood cells are formed here d) It is a major cont. f. They move extremely fast. A) lizards B) crocodiles C) snakes D) birds E) mammals. Which of the following are the only extant animals that descended directly from dinosaurs? Destructive as it is to the fossil beds, this paleo economy has helped rewrite prehistory. d. proteins. Answer: B 31) Why is the discovery of the fossil Archaeopteryx significant? Why is the amniotic egg considered an important evolutionary breakthrough? While many other animals have evolved from dinosaur ancestors, these three lineages have remained relatively unchanged for millions of years. The list includes 10 species of birds and bats localized entirely to the Pacific islands, as well as 8 different types of freshwater mussels. (a) Bacteria (b) Viruses (c) Fungi (d) HIV but not other viruses. They named the new species Confuciusornis, after the Chinese philosopher. You can specify conditions of storing and accessing cookies in your browser. After the emergence of single filaments came multiple filaments joined at the base. A group of reptiles known as archosaurs initially arose around 251 million years ago, towards the beginning of the Triassic Period. Which of these are amniotes? Crocodiles are members of the Reptilia taxonomic class with other creepy crawlers, including snakes and . a. How Long Do Rats Usually Live In Captivity? It lived around 125 million years ago, based on the dating of radioactive elements in the sediments that encased the fossil. D) they are in the vagina for three days. (a) phagocytosis (b) interacting directly with pathogens (c) producing antigens (d) producing antibodies. B. the mineralization of the endoskeleton C. Feet with digit A. Dinosaur traits were looking more birdlike all the time. a) buffalos b) nutria c) egrets d) brown moths, What is the fertilized egg? This would have given them an advantage in competition with other animals for resources and mates. The skeleton had a birdlike skull, a long tail and impressions of what appeared to be feather-like structures. This species must have evolved and spread very quickly as there is almost no variation from specimen to specimen. C) DNA determines the amino acid sequence of our proteins. The first birds were small carnivorous predators with sharp teeth and claws. Three bases on the DNA are the code for one amino acid c. The genetic code of DNA is copied by mRNA d. tRNA molecules carry the amino aci. The most closely related extant animal class to the dinosaurs is the reptiles. appeared first? It was the morganucodontids, small shrew-sized animals that lived in the shadow of the dinosaurs 210 million years ago that were the first known mammals to have evolved. A) lizards B) crocodiles C) snakes D) birds E) tuataras theo Hero Member Posts: 698 This hollow ball shaped stage is called a, The fungus body, such as a mushroom, is called a ____________, This type of fungus is killing our beloved frogs _________________, Deuterostomes have this type of cleavage_____________, Fungi have cell walls made of _______________, Chelicerata have _________ pairs of antennae, The sessile stage of a jellyfish is called ______________, Molting, as when a caterpillar sheds its exoskeleton, is known as____________, A cocoon that larvae form before complete metamorphosis is better They said dinosaurs lack a number of features that are distinctly avian, including wishbones, or fused clavicles; bones riddled with air pockets; flexible wrist joints; and three-toed feet. 1. amniotic egg 2. paired fins 3. jaws 4. swim bladder 5. four-chambered heart 2, 4, 3, 1, 5 3, 2, 1, 4, 5 2, 1, 4, 3, 5 2, 3, 4, 1, 5 3, 2, 4, 1, 5 2, 3, 4, 1, 5 Jaws first occurred in which extant group of fishes? pseudocoelom which phylum is characterized by animals that have a segmented body arthropoda The water vascular system of echinoderms functions in locomotion, feeding, and gas exchange. All are herbivores. This blog post will explore some of the most popular theories about which traits appeared first as hominins diverged from other primates. Blood vessels similar to those found in fish gills run through these arches, providing an extensive surface area for gas exchange between the air entering through the mouth or nose and blood passing through them. . That's the same group that Tyrannosaurus rex belonged to, althou View the full answer Transcribed image text: 25. Since the last of the non-avian dinosaurs died out 65 million years ago during the mass extinction that closed the curtain on the Cretaceous period, birds have evolved other characteristics that set them apart from dinosaurs. Until then, only a handful of prehistoric bird fossils had been unearthed anywhere in the world. Stefen Chow. "But finally in Maniraptorans, feathers stabilized and evolved into modern feathers," he says. "Sitting on a nest like that only made sense if it had feathers" to gently insulate its young, says Sues. They. Which of these characteristics added most to vertebrate success in relatively dry environments? Dinosaurs were cold-blooded, similar to current reptiles, with the exception that their massive bulk would have helped to keep their body temperatures stable. Which antibiotic in the list below inhibits bacterial cell wall synthesis? All are found on bald men. (TOP 5 Tips). Get access to this video and our entire Q&A library, Paleontology & Dinosaurs - Definition, History & Facts. C) It carries amino acids to the ribosome. Their feathers separate them from all other types of animals; no other creatures on the planet have feathers like theirs. 1 Hyphae are haploid 2 Fungi reproduce sexually when conditions are stressful 3 The skin and central nervous system develop from ectoderm 4 In deuterostomes the blastopore develops into the anus 5 Which group has indeterminate cleavage? The amniotes reptiles, birds, and mammalsare distinguished from amphibians by their terrestrially adapted egg, which is protected by amniotic membranes. Modern birds are derived from a group of two-legged dinosaurs known as theropods, which included the towering Tyrannosaurus rex and the smaller velociraptors, as well as other large and tiny birds. Also, Yi qi was discovered in the last couple of years. Marsupials have a very different reproductive system from other mammals; they give birth to live young but keep them in their pouch until they are developmentally mature enough to survive on their own. drying are characteristics of, This group can use their skin for significant gas exchange, Lungs and the digestive system develop from, This group has one pair of legs per body segment. Which of the following gives the most support to the endosymbiotic theory for the origin of eukaryotic cells? For instance, reptiles typically have four legs, while dinosaurs typically have two or more pairs of legs. Since 1500 alone, approximately 900 species have gone extinct. Fish and squid. Some paleontologists envision a scenario in which dinosaurs used feathers to help them occupy trees for the first time. It contains the coding for over 100,000 genes. How are the digestive organs modified for the efficient mechanical digestion in the following: a) grazers (ruminants) b) seed eaters without teeth (birds). Of the animals listed below, which urinates upon standing from a recumbent position? Hunting. These animals have remained relatively unchanged since the time of the dinosaurs and have been able to adapt and survive in today's world. c. terminal hairs d. vellus hairs, Which of the following is a property of mitochondrial DNA? E) None of these are substrates for trypsin. A. Estimates of their population during the early 18th differ but range between 300,000-500,000. Which of the following are the only extant animals that descended Moreover, its bone structure was similar to that of Archaeopteryx. d. It changes rapidly from generation to generation. Vertebra, Jaws, Swim Bladder, Amnitoic egg, Four-chambered heart 25. Cookie Policy Which of the following are the only extant animals that descended directly from dinosaurs? Scientists have been able to trace the evolutionary lineage of birds back to theropod dinosaurs through the use of fossils and comparative anatomy. What do the following all have in common? e. Mitoch, Which of the following options is correct? An experienced fossil hunter, Li split the slab and beheld a creature unlike any he had seen. Four of the following are nitrogenous bases of DNA or RNA, while is an amino acid. For example, most amphibians must return to water to mate and lay their eggs. Which characteristics were observed in the common ancestor of these two groups? This is one of the key characteristics that separate these groups from other animals, like invertebrates, which do not have a backbone. In a cold environment that supports life, an ectotherm is more likely to survive an extended period of food deprivation than would an equal size endotherm because the ectotherm a. expends more energy per kilogram of body mass than does the endotherm.
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