B There is no relationship. The availability of abiotic factors such as light, moisture, mineral salts, heat and carbon dioxide, more or less conditions the biodiversity of an ecosystem. Most marsupial and all monotreme species today, are found in: a Australia b Asia c Europe d Central and south America 10. . A Echinodermata-branch of Bilateria, coelom forms from archenteron B Nematoda-roundworms, pseudocoelomate C Cnidaria-radial symmetry, diploblastic D Platyhelminthes-flatworms, acoelomates E Porifera-coelomates, mouth from blastopore 36 What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates A have a body cavity, whereas pseudocoelomates have a solid body.
C It has bilateral symmetry. Acoelomates are characterized by a The absence of brain b The absence of mesoderm c A solid body without a cavity surrounding internal organs d A coelom that is not completely lined with mesoderm 7. What are some economic applications that can be generated by very biodiverse ecosystems? The coral provides N and P as waste products which the zooxanthella can use, and protects the dinoflagellate from grazing. A increased incidence of worm burrows in the fossil record B increased incidence of larger animals in the fossil record C increased incidence of organic material in the fossil record D increased incidence of fern galls in the fossil record E increased incidence of hard parts in the fossil record 18 Fossil evidence indicates that the following events occurred in what sequence, from earliest to most recent? A similar structures arising independently in different lineages B convergent evolution among different lineages C adaptation by different lineages to the same selective pressures D A and B only E A, B, and C 12 The Hox genes came to regulate each of the following in what sequence, from earliest to most recent? In these ecosystems, environmental changes can be more easily compensated for the large amount of available resources, food and survival options. Vertebrates and tunicates share a Jaws adapted for feeding b A high degree of cephalisation c A notochord and a dorsal, hollow nerve cord d The formation of structures from the neural crest 5. Before they developed hard shells that are well represented in the fossil record.
Multicellular animals evolved and diversified into the major lineages phyla seen today: A. The water vascular system of a Functions as a circulatory system that distributes nutrients to body cells b Functions in locomotion, feeding, and gas exchange c Is bilateral in organization, even through the adult animal is not bilateral symmetrical d Moves water through the animal body during suspension feeding 6. D It provides insulation to conserve heat. Humans and the other anthropoid primates descended from a common ancestor a few million years ago. Are humans and the rest of the anthropoids related and how? C lack mesodermally derived tissues. A They are one and the same. Very biodiverse areas present enormous economic potential.
D It possesses sensory structures at its anterior end. E by using enzymes to digest their food. Is monoculture a system that contributes to the biological diversity of an ecosystem? C Some, but not all, grades reflect evolutionary relatedness. What is true of adults, but not of larvae? This means that they do not have specialized cells, or cells that have the same structure, that work together for the same purpose. Such variations in abiotic and biotic factors put selective pressure on living organisms, causing them to be diversified; as result, there are more ecological niches to be explored and more varied organisms emerge during the evolutionary process.
Exoskeletons also produced new restraints. How can a large amount of biological diversity protect an ecosystem from environmental damage? Which of the following should convince you that the organism is an acoelomate? Why is the amniotic egg considered an important evolutionary breakthrough? When you have completed the practice exam, a green submit button will appear. B contain tissues derived from mesoderm, whereas pseudocoelomates have no such tissue. A It responds to food by moving toward it. How do they do this? D Grades have their basis in, and flow from, clades. Sea jellies have muscles, but no skeleton. What is an open circulatory system? Which of the following correctly pairs the group with the location? Humans have inhabited this planet for only the last 2.
Explain the difference between radial and bilateral symmetry. Bilateral symmetry is where there is a top and bottom, but also front and back and left and right. Phylogeny and the Classification of Organisms Chapter Exam Instructions Choose your answers to the questions and click 'Next' to see the next set of questions. Therefore, even small-scale environmental damage can cause big disturbances in the equilibrium of the ecosystem. Why aren't echinoderms classified with the radiata, when they have radial symmetry? The second is the invasion of ecosystems by non-native species introduced by humans; these species change the equilibrium of ecosystems, causing harm. The large mass of producers makes the appearance of a diversity of consumers of several orders possible.
Think of a perfect pumpkin. They are sources of species for agriculture. D A and B only E A, B, and C 29 What is the main basis for placing the arthropods and nematodes in the Ecdysozoa in one hypothesis of animal phylogeny? B It allows deposition of eggs in a terrestrial environment. Mammals and living share all of the following characteristics except a Endothermy b Descent from a common amniotic ancestor c A dorsal, hollow nerve cord d An archosaur common ancestor 9. E It permits internal fertilization to be replaced by external fertilization.
They can also be explored by ecological tourism. Which of the following statements about reconstructing phylogenies is false? Despite having a large amount of biodiversity, why is the Amazon Rainforest facing the risk of desertification? All animal clades based on body plan have been found to be incorrect. A Animals in both groups are segmented. Eat a lot and eat constantly. A fossil evidence B comparative morphology of living species C nucleotide sequences of homologous genes D similarities in metabolic pathways E the number and size of chromosomes within nuclei 53 Phylogenetic trees are best described as A true and inerrant statements about evolutionary relationships. A It has a shell that increases gas exchange. How does the vegetal stratification of an ecosystem influence its biological diversity? E Analysis of genes shows that their sequences are quite similar, and these sequences differ from those of the lophotrochozoans and deuterostomes.
What does amphibian mean and why are they called that? E have a gut that lacks suspension within the body cavity, whereas pseudocoelomates have mesenteries that hold the digestive system in place. Are humans and the rest of the anthropoids related and how? Salamander belongs to the class: a Aves b Reptiles c Pisces d Amphibian 4. The phyla Cnidaria and Ctenophora have two basic differences from the rest of the eumetazoa. A genes involved in chitin synthesis B collagen genes C crystallin genes D myosin genes E globin genes 4 Both animals and fungi are heterotrophic. A 2, 4, 3, 1 B 2, 1, 4, 3 C 2, 4, 1, 3 D 2, 3, 1, 4 E 2, 1, 3, 4 24 During metamorphosis, echinoderms undergo a transformation from motile larvae to a sedentary and sometimes sessile existence as adults.
What does amphibian mean and why are they called that? These animals have radial symmetry and have diploblastic embryos embryos that form two distinct germ layers. A natural selection of sexually immature forms of insects B changes in the homeobox genes governing early development C the evolution of meiosis D B and C only E A, B, and C 11 What may have occurred to prevent species that are of the same grade from also belonging to the same clade? Echinoderms are also deuterostomes, giving them something else in common with chordates. Other big dangers are predatory hunting and fishing and global warming. A radial and spiral; determinate and indeterminate B radial and indeterminate; spiral and determinate C radial and determinate; spiral and indeterminate D spiral and determinate; radial and indeterminate E spiral and indeterminate; radial and determinate 50 What does recent evidence from molecular systematics reveal about the r elationship between grades and clades? Arthropods exoskeletons made life on land possible. What are some ways birds produce the large amount of energy needed for flight and endothermy? E Muscular activity of its digestive system distorts the body wall. Therefore, in the upper layer near the canopies of large trees, the exposure to light, rain and wind is greater, whereas moisture is lower compared to the lower layers. However, exoskeletons don't grow and the rest of the animal does.