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anonymous

  • one year ago

Help me with biology please

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  1. anonymous
    • one year ago
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    3. At some point in their lives, all chordates have a flexible supporting rod in their backs called a (1 point) notochord. gill. nerve cord. backbone. 4. What kind of body plan do most animal phyla exhibit? (1 point) bilateral symmetry dorso-ventral symmetry radial symmetry no symmetry 5. One evolutionary trend is that as you move from simpler animals to more complex animals, (1 point) systems become more specialized. systems become less specialized. organs become less specialized. cells become less specialized. 5/26/2015 Animals Practice https://www.connexus.com/assessments/engine.aspx?idAssessment=316287&idWebuser=1218090&idSection=391410&idHtmllet=4798613&close=tr … 2/7 6. The concentration of nerve cells and sense organs in the head is called (1 point) centralization. specialization. cephalization. neutralization. 7. What does evidence show about radial symmetry in invertebrates? (1 point) All invertebrates with radial symmetry are closely related. Radial symmetry was the very first invertebrate body pattern. Radial symmetry in invertebrates disappeared millions of years ago. Radial symmetry evolved at least twice in unrelated invertebrate groups. 8. The fossil record shows that a type of aquatic arthropod arose 505–440 million years ago and is now extinct. Which of today's animals might that ancient organism most resemble? (1 point) crabs, spiders, and scorpions fish and jellyfish marine mammals aquatic snakes The diagram below shows the fossils found in layers of rock at three different locations. 9. Most of the fossils in the above diagram closely resemble which modern group of organisms? (1 point) anthropods echinoderms mollusks vertebrates 5/26/2015 Animals Practice https://www.connexus.com/assessments/engine.aspx?idAssessment=316287&idWebuser=1218090&idSection=391410&idHtmllet=4798613&close=tr … 3/7 10. What feature of the fossil Pikaia led scientists to classify it as a chordate? (1 point) tentacles a definite head region a notochord segmentation 11. During the early Devonian Period, fish were limited in their ability to feed. What adaptation made feeding easier? (1 point) gills cartilage jaws paired fins 12. To which vertebrate group are birds most closely related? (1 point) fishes amphibians reptiles mammals 13. New World monkeys evolved separately from other anthropoid primates because they (1 point) lived in areas without trees. were nocturnal. were geographically separated from other primates. had C-shaped rather than S-shaped spines. 14. Scientists think that chimpanzees are more closely related to humans than are any other primates. What evidence best supports this theory? (1 point) Humans and chimpanzees both have binocular vision. Humans and chimpanzees are both placental mammals. Human and chimpanzee embryos both undergo gastrulation. Humans and chimpanzees share all but 5 percent of their DNA sequences. 15. What does the latest evidence show about hominid evolution? (1 point) Neanderthals evolved into modern humans. There were fewer species of the genus Homo than researchers thought. Hominid evolution included many species whose relationships are difficult to determine. 5/26/2015 Animals Practice https://www.connexus.com/assessments/engine.aspx?idAssessment=316287&idWebuser=1218090&idSection=391410&idHtmllet=4798613&close=tr … 4/7 Hominids evolved in a straight line, with one species changing into another. Multiple Choice 16. Vertebrates digest food in digestive tracts. Cnidarians accomplish the same function using (1 point) specialized teeth. crops and digestive enzymes. gizzards. gastrovascular cavities. 17. The digestive systems of carnivores typically (1 point) have more than one stomach to digest cellulose. include relatively long intestines with colonies of bacteria. are short and produce fast acting enzymes. contain gizzards for digesting seeds. 18. As various vertebrate groups evolved, the structure of the heart changed. Which of the following describes the hearts of birds and mammals? (1 point) one atrium and one ventricle two atria and one ventricle one atrium and two ventricles two atria and two ventricles 19. The circulatory system of a vertebrate that uses lungs for respiration has (1 point) three or more loops. no loops. a single loop. a double loop. 20. Spiders obtain oxygen using book lungs. Insects accomplish the same function using (1 point) gills. lungs. tracheal tubes and spiracles. Malpighian tubules and air sacs. 21. What are Malpighian tubules? (1 point) 5/26/2015 Animals Practice https://www.connexus.com/assessments/engine.aspx?idAssessment=316287&idWebuser=1218090&idSection=391410&idHtmllet=4798613&close=tr … 5/7 organs in insects that remove waste materials from blood and deposit them with feces or digestive wastes that move through the gut organs in annelid worms that filter fluid in the coelom as part of the excretory system structures in insects through which air enters the tracheal tubes structures in annelid worms that make up the tube-within-a-tube digestive tract 22. Reptiles that excrete uric acid instead of ammonia are able to (1 point) exchange gases through the skin. control body temperature through endothermy. conserve water within the body. break down food using a gizzard. 23. Why should a person who sells fish and fish aquaria learn about the excretory systems in animals? (1 point) so that they can understand how gastrointestinal diseases spread among aquatic animals so that they can get a license to sell exotic fish so that they can maintain the salinity of their aquaria to keep their aquatic animals healthy so that they can maximize the number of individuals they can maintain in their store at any one time 24. What is the term for a reaction to a stimulus? (1 point) innate response learning insight 25. All arthropods have similar nervous systems. What are the components of an arthropod's nervous system? (1 point) brain and spinal cord tracheae and spiracles brain, nerve cord, and ganglia notochord and pharyngeal slits 26. As a group, animals use both sexual and asexual reproduction. Which of the following can reproduce asexually? (1 point) amphibians echinoderms mammals cnidarians 5/26/2015 Animals Practice https://www.connexus.com/assessments/engine.aspx?idAssessment=316287&idWebuser=1218090&idSection=391410&idHtmllet=4798613&close=tr … 6/7 27. Land-dwelling anthropoids use internal reproduction instead of external reproduction. Why is internal reproduction advantageous for land animals? (1 point) Land animals do not lay eggs. Land animals are all ectotherms. Internal fertilization does not require a watery environment. Life on land requires more genetic diversity than life in water. Ectotherms Endotherms Dependent on external temperature Can generate heat internally Require Less Food Require more food Adapted to warm and constant temperatures Can survive in cooler and more variable temperatures 28. What is the BEST explanation for the difference in food intake needed for endotherms and ectotherms? (1 point) Internal heat generation requires a large amount of energy. Endotherms must constantly be moving to warmer environments. Ectotherms have simpler digestive and excretory systems. Living in warm climates requires more food than living in cool climates. 29. For insulation, mammals use (1 point) hair and sweat glands. hair and fat. muscles and sweat glands. muscles and fat. 30. In order for multicellular organisms to maintain homeostasis (1 point) their cells must continually grow in size. their organ systems must work together. their cells must all be identical. each cell must act like an individual organism. 31. To have an impact on the evolution of a species, what criteria does a behavior have to meet? (1 point) A behavior must affect an organism's fitness and have a genetic basis. A behavior must be a polygenic trait. A behavior must be innate and at a high frequency in a population. A behavior must be the result of single gene. 32. Many species of moths will fly toward bright light. Which of the following describes this behavior? (1 point) 5/26/2015 Animals Practice https://www.connexus.com/assessments/engine.aspx?idAssessment=316287&idWebuser=1218090&idSection=391410&idHtmllet=4798613&close=tr … 7/7 32. Many species of moths will fly toward bright light. Which of the following describes this behavior? (1 point) The moths have become habituated to bright light. The moths are displaying classical conditioning. The moths have used insight learning to respond to the light. The moths display an innate response to an external stimulus. 33. All behaviors in which animals change their actions as a result of experience are (1 point) instinctive. learned. operant conditioning. classical conditioning. 34. What is the most likely reason a bird species migrates? (1 point) to avoid predators to practice their navigational skills to take advantage of seasonal food sources to find a safe area to hibernate during the winter 35. Many animals form complex societies of related individuals. Which of the following benefits do these societies provide? I. protection for young animals II. an outlet for aggression III. improved hunting ability (1 point) II only III only I and III only I, II, and III 36. The pheromones by which ants transmit information are (1 point) visual signals. electrical signals. sound signals. chemical signals.

  2. anonymous
    • one year ago
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    someone please help

  3. NathalyN
    • one year ago
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    for number one, animals don't have cells with cell walls

  4. anonymous
    • one year ago
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    Thank you I already got that one though do you have any more? @NathalyN

  5. NathalyN
    • one year ago
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    http://brainly.com/question/479122 for number 3

  6. NathalyN
    • one year ago
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    number 4 bilateral symmetry

  7. anonymous
    • one year ago
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    Thank you @NathalyN

  8. NathalyN
    • one year ago
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    http://brainly.com/question/480297 for 7

  9. NathalyN
    • one year ago
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    crabs, spiders, scorpions for 8

  10. anonymous
    • one year ago
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    Thank you so much for all of this @NathalyN

  11. NathalyN
    • one year ago
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    a notochord 10

  12. NathalyN
    • one year ago
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    13 were geographically separated from other primates.

  13. anonymous
    • one year ago
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    @MyDilemma can u help me? plss

  14. MyDilemma
    • one year ago
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    @sallyfield888 i'm sorry, but i can't ):

  15. MyDilemma
    • one year ago
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    All my work including this review, cca won't let me review it @sallyfield888

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