biology

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Author:
khowsare
ID:
203575
Filename:
biology
Updated:
2013-03-27 19:08:20
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test
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Biology Test 3
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  1. name 5 products by bugs that are used by people
    silk, bee stings for therapy, dyes, inseck galls, shellac, maggot therapy, leeches,
  2. What is MAGGOT THERAPY?
    help clean wounds faster and promote faster healing
  3. What is entomophagy?
    study of insects and their relationship to humans, the environment, and other organisms
  4. What is a virus?
    small infectious agent that can only replicate inside the cells of another organism.
  5. What is a bacterium?
    A member of a large group of unicellular microorganisms lacking organelles and an organized nucleus, including some that can cause disease.
  6. What is a bacteriophage?
    A virus that parasitizes a bacterium by infecting it and reproducing inside it.
  7. How are viroids and prions different?
    Viroids: cause crop diseases

    Prions: infected particles which causes mad disease
  8. What is the primary reason today we should greatly fear bacterial infections?
    out of antibiotics
  9. What are Archaea and what are the 3 main types?
    archaea: group of single-celled microorganisms

    3 main: Methanogens, halophiles, thermoacidophiles
  10. What are protists?  Name some
    protists: single celled organism

    Algae, Protazoa
  11. What is a slime mold?
    organisms that uses spore to reproduce
  12. What is the significant evolutionary role played by the charophytes?
    believed that land plants come from this underwater plant
  13. What are mosses, lychophytes, gymnosperms and angiosperms?
    moss:A small flowerless green plant that lacks true roots

    lychophyes: first to have a vascular system

    gymnosperms: cone- bearing plants

    angiosperms: flowering plants
  14. Describe the “alternation of generations”.
    reproductive cycle of those plants, fungi and protists in which a multicellular diploid phase alternates with a multicellular haploid phase
  15. What determines which plant generation is the dominant generation?
  16. What is a vascular plant?
    lignified tissues for conducting water and minerals throughout the plant
  17. How do perfect and imperfect flowers differ?
    perfect meaning it has everything, imperfect meaning it is missing male or female parts
  18. What is a monoceious plant?  How about a dioecious one?
    monoceious: male and female on both plant

    dioecious: male and female on separate plants
  19. What are fungi and hyphae?
    fungi: spore-producing organisms feeding on organic matter

    hyphae:Each of the branching filaments that make up fungi
  20. Describe how fungi can be pests.
    it can take over and kill crops, for example corn smut
  21. What is the colonial flagellate hypothesis?
    the first animal evolved from flagellate protists that lived in colonies
  22. Compare and contrast bilateral and radial symmetry.
    radial meaning you can split it in half from any angle and it will be equal. nilateral meaning you can only split it down the center to be equal
  23. What are the 5 principal evolutionary trends in animals?
    • 1. multicellular
    • 2. germ layers
    • 3.differ in germ layers gave rise to what organs
    • 4. presence of absences of coelom
    • 5. protostomes v deterostemes
  24. Describe a sponge and a cnidarian.
    sponges: sac-like bodies perforated by many pore, marine life,

    cnidarian: ancient group of invertebrates with in a rich fossil record
  25. How do flatworms, mollusks and annelids differ?
    flatworm: bilateral symmetry and have no coelon

    mollusks: coelomate organisms with a complete digestive tract

    annelids: segmented
  26. What is an arthropod?
    invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
  27. What is the most closely related invertebrate to the chordates?
    tunicates and lancelets
  28. What were the first chordates to have jaws and lungs?
    fishes
  29. How are amphibians and reptiles different?
    • amphibians: water and land life
    • reptiles only live on land
  30. What is a poikilotherm?
    body temperature varies because of the surroundings
  31. What chordate has hollow bones?
    birds
  32. How are monotremes and marsupials different?
    monotremes: lay eggs

    marsupials: give live birth
  33. What is a chordate?  How about a hominid?
    chordate: have spinal collum

    hominid: A primate of a family
  34. What is onchocerciasis and what is its life cycle?
    transmitted through the bites of blackflies to humans, the bite releases the dieses which the grows and mates inside of the host. they can live for up to 15 years.
  35. What does the tsetse fly transmit?
    sleeping disease
  36. What is a dracunculoid worm?
    parasite that grows in host causing blisters often in legs and feet

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