That is, it had a backbone made of vertebrae. Which of the following organ systems involves egg production? An example of a homeostatic response is a. an increase in body temperature that results from involuntary shivering. Birds evolved from feathered dinosaurs during the Mesozoic Era as well. Well, for one thing, this ancestor was almost certainly a vertebrate. Komodo dragons are perhaps the strangest-looking animal on this list, but they also descended directly from dinosaurs. inside the mother are called. Ichthyosaurus Animal Facts | Ichthyosaurus communis - AZ Animals All rights reserved. Which of the following options is correct? An increase in this hormone is primarily responsible for the maturation of the follicle. Feathers may have become increasingly aerodynamic over millions of years, eventually allowing dinosaurs to glide from tree to tree. Which of the following are the only extant animals that descended Most dinosaurs were not part of the lineage that gave rise to birds; they occupied other branches of the dinosaur family tree. "All those things were yanked out of the definition of being a bird," says paleontologist Matthew Carrano of the Smithsonian National Museum of Natural History. Chapter 34: Chordates Flashcards - Easy Notecards These strange creatures lay eggs instead of giving birth to live young like most other mammals. 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. Required fields are marked *. D), Which of the following organisms form biofilms? Marsupials are interesting animals because they have a pouch on their stomach where they carry their young. As hominins diverged from other primates, which of the following Which of the following can be transmitted to humans who eat infected meat? If you encounter an animal with feathers, you may be certain that it is a bird. Gills are outgrowths of the pharyngeal (throat) region that develop into respiratory organs specialized for exchanging oxygen and carbon dioxide with water. B. Cervix. B) Chymotrypsinogen. 100 Recently Extinct Animals - ThoughtCo The first true mammals were small creatures living in the dinosaurs shadows. "It was such an amazing fossil," recalls paleontologist Hans-Dieter Sues of the National Museum of Natural History. Given the extent of these avian adaptations, it's no wonder the evolutionary link between dinosaurs and birds as we know them remained hidden until paleontologists started analyzing the rich fossil record from China. A. Thymine B. Guanine C. Uracil D. Adenine, Which of the following is false about proteins? A group of reptiles known as archosaurs initially arose around 251 million years ago, towards the beginning of the Triassic Period. Reptiles evolved from amphibians and are distinguished by their dry scales, which provide protection from predators and help them regulate their body temperature. D) It contains the instructions for protein synthesis. The vast majority of these are fish, with over 32,000 species. What is gestation? Translation. 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. What is the most specific group that includes both the Old World Hard to say. Birds evolved from a group of two-legged reptiles called theropods. What nitrogenous bases are found in DNA? That's the same group that Tyrannosaurus rex belonged to, althou View the full answer Transcribed image text: 25. "Amazing place, isn't it?" Extant vertebrates are animals that have a spine or backbone. These animals are distinguished from invertebrates, which do not have a backbone. They have a plasma membrane, cytoplasm, ribosomes, mitochondria RNA and DNA. e. It permits internal fertilization to be replaced by external fertilization. c. progesterone. 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? d. Bacterial cells dry out. Which of the following serves as a template or mold for the formation of a protein? Some paleontologists envision a scenario in which dinosaurs used feathers to help them occupy trees for the first time. d. red bone marrow. A) Mucin B) Enzymes C) Hormones D) Waste products E) DNA, Which of the following requires RNA polymerase? Last year, Xu discovered another species of four-winged dinosaur, also at Liaoning. This is the first group to appear in the fossil record that can truly Volcanic eruptions regularly convulsed the area at the time, entombing untold millions of reptiles, fish, snails and insects in ash. B lymphocytes C. Both T cells and B cells. Some reptiles, such as snakes and lizards, have lost their limbs throughout evolution. It is also possible that both bipedalism and increased brain size appeared simultaneously in early hominins. The maturation of this type of lymphocyte takes place in the bone marrow. Terrestrial amphibians typically close off their mouths and nostrils while underwater so that water does not enter their lungs; instead, they breathe entirely through their skin! It has a shell that increases gas exchange. "Deep in evolutionary history, it is extremely difficult to draw the line between birds and dinosaurs," says Xu. C) snakes. One of China's star paleontologists, Zhou Zhonghe, smiles. Transcription B. d. an A in DNA matc, Which of the following events occurs FIRST? They have cytoplasm and DNA, RNA nucleus, proteasomes, lysosomes, and a cytoskeleton. Respiratory C. Urinary D. Digestive E. Male reproductive F. Female reproductive. A) Anthrax. a. overharvesting A. T lymphocytes B. An early cousin of all primates, including humans, managed to escape the extinction of the rest of the species. What is the function of the tails on the phospholipids? This contrasts ectothermic animals like amphibians and fish, who rely on external heat sources to regulate their body temperature. A tiny well-preserved fish specimen can yield its finder the equivalent of 25 cents, enough for a hot meal. Chondrichthyans 7 You would call it a feathered dinosaur," says Carrano. 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. Chapter 34: The Origin and Evolution of Vertebrates Flashcards This species must have evolved and spread very quickly as there is almost no variation from specimen to specimen. The bald eagle ( Haliaeetus leucoephalus) is the national bird of the United States and one of the most recognizable eagle species in the world. A. zygote B. blastocyst C. morula D. conceptus E. None of the above s correct. Western paleontologists soon made a pilgrimage to Beijing to see the fossil. 25. (a) Spermatid (b) Mature sperm (c) Primary spermatocyte (d) Secondary spermatocyte (e) Spermatozoa. So the next time you and a friend go to a farm, keep in mind that every one of those squawking chickens is actually the closest living relative of one of the most magnificent predators the world has ever witnessed! Which of the following is true about gametes? All living mammals today, including humans, are descended from the one line of ancestors that managed to survive. The enzyme pepsin digests a. carbohydrates. be called a vertebrate. All other trademarks and copyrights are the property of their respective owners. B) bony fishes. Individuals able to perform such a feat might have been able to reach new food sources or better escape predatorsand pass the trait on to subsequent generations. Deinonychus, or "terrible claw" after the sickle-shaped talon on each hind foot, stood about 11 feet from head to tail and was a lithe predator. The amniotes reptiles, birds, and mammalsare distinguished from amphibians by their terrestrially adapted egg, which is protected by amniotic membranes. 10) Differentiation of teeth is observed in A) sharks. Verified answer. d. proteins. The number and position of pharyngeal pouches vary among different groups of animals, but all vertebrates have at least one pair. a. zygote b. spermatocyte c. embryo d. fetus. Menstruation is triggered by a drop in the levels of a. LH. chemically castrate frogs, The______________surrounds the embryo and holds water in reptiles, Exam 1 Bio 2 Flashcards | Chegg.com He couldn't have been more prophetic. B. the mineralization of the endoskeleton C. Feet with digit A. 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. Each pouch gives rise to a single external gill filament in fishes and some aquatic amphibians, such as newts and salamanders. (a) phagocytosis (b) interacting directly with pathogens (c) producing antigens (d) producing antibodies. This means that birds share a common ancestor with the likes of the T. rex and Velociraptor. Cookie Settings, Roger Peterson / National Geographic Stock, Kim Amos / Science Photo Library / Photo Researchers, See 11 Breathtaking Bird Images From the Audubon Photography Awards, The Real History Behind the Archimedes Dial in 'Indiana Jones and the Dial of Destiny', Forensic Artist Reconstructs the Face of a Teenager Who Lived 1,300 Years Ago, Eight Menacing Saber-Toothed Creatures That Stalked the Earth Long Ago, How One Man Accidentally Killed the Oldest Tree Ever. Few scientists know ancient feathers more intimately than IVPP's Xu Xing. Additionally, increased brain size is associated with increased intelligence, which would have helped early hominins to solve problems and adapt to their environment. Australian marsupials include koalas, kangaroos, and wallabies, while South American marsupials include opossums and sugar gliders. deuterostomes 6 Jaws first occurred in which extant group of fishes? Lungs and the digestive system evolve from which layer? "They came back dazed," Sues says. D) Three of the options listed are correct. A skeleton that is both light and powerful. "Chairman, come here and look," Zhou says to Zhang (who earned his playful nickname as chairman of IVPP's employees union). I, like Professor Stevens, am an African American because my Show transcribed image text Expert Answer 100% (7 ratings) In addition, this ancestor probably had some protective covering on its body. A) It is found in the nucleus. | Theme by SuperbThemes.Com, What Animals Live In The Temperate Forest? Scientists have located only ten intact fossilized skeletons of the earliest known bird, Archaeopteryx, which lived at the end of the Jurassic period, about 145 million years ago. "It passes the sniff test," Carrano says. Sinosauropteryx, in fact, was what paleontologists call a non-avian dinosaur, even though it had feathers. Which of the following options is correct? Birds are the only extant animals that descended directly from dinosaurs. Which of the following does not take place during fertilization? Other paleontologists speculate feathers first evolved to retain heat. Oocytes are produced and released from which of the following structures? Dinosaurs are members of this wider group of reptiles. Answer: D) Birds are the only living creatures that can be traced back to their dinosaur ancestors. Zhang examines the specimen and adds it to a pile that will be hauled back to Beijing for studyand, if they are lucky, reveal another hidden branch of the tree of life. vertebrae 2 Chordate pharyngeal slits appear to have functioned first as suspension-feeding devices 3 Which extant chordates are postulated to be most like the earliest chordates in appearance? C) Migrating motility complex. This is another key characteristic that helps distinguish these groups from others; birds are bipeds or two-legged creatures. These animals have remained relatively unchanged since the time of the dinosaurs and have been able to adapt and survive in today's world. Microraptor, from the Dromaeosaur family, was not an ancestor of birds, but it was also unlike any previously discovered feathered dinosaur. It's official: birds are literally dinosaurs. Here's how we know Bird feathers and reptile scales contain melanosomestiny sacs holding varieties of the pigment melanin. Maybe feathers helped them scramble up tree trunks," Carrano says. b. B-lymphocytes respond to foreign protein by _______. Which species of bacteria produce the enzyme urease? A) lizards B) crocodiles C) snakes D) birds E) mammals. It serves as the blueprint for an individual. Their feathers separate them from all other types of animals; no other creatures on the planet have feathers like theirs. Study with Quizlet and memorize flashcards containing terms like Which of the following are the only extant animals that descended directly from dinosaurs? The list includes 10 species of birds and bats localized entirely to the Pacific islands, as well as 8 different types of freshwater mussels. 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. Feathers did, of course, eventually become an instrument of flight. nipple drinking milk, At one stage of early development, you were shaped like a hollow This could have been scaled (as in much modern-day fish) or something else entirely. The first sign of gill development in a developing embryo is the appearance of pharyngeal pouches. The resulting structures are called. Their demise left only one dinosaur lineage capable of flight: birds. Become a Study.com member to unlock this answer! A) Adaptive immunity B) Acquired immunity C) Behavioral immunity D) Innate immunity E) Both A and B, Which form of immunity develops during the course of life? Which fish is most closely related to tetrapods? invests less energy in temperature regulation. And of course they aid flightbut not always, as ostriches and penguins, which have feathers but do not fly, demonstrate. But other Chinese paleontologists were convinced it was a dinosaur. (Solution found) . a. Which of the following are the only extant animals that descended directly from dinosaurs? Jaws first occurred in an extinct group of fishes called placoderms.
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which extant animals descended directly from dinosaurs?