Lab Exam 3

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Lab Exam 3
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2010-12-13 11:01:21
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Montgomery College Lab Exam
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Lab Exam 3
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  1. What are the stages of development?
    Unfertilized egg, fertilized egg, early clevage, late clevage, blastula, gastrula, larva

    UFELBGL
  2. During the cleavage stages the overall size of the zygote
    (increases/decreases/remains the same) as it
    divides into numerous smaller cells called _______.
    remains the same, blastomeres
  3. Cell differentiation begins during the ______ stage.
    gastrula
  4. During the _____ stage 3 germ layers are formed. What are the names of the three layers?
    • Gastrula
    • Ectoderm, endoderm, mesoderm
  5. Name at least one tissue/organ/system
    that is derived from each of these germ layers.
    ECTODERM- NERVOUS SYSTEM, EPIDERMIS

    • ENDODERM- INNER
    • LINING OF DIGESTIVE SYSTEM

    • MESODERM- SKELETON,
    • MUSCLES, CIRCULATORY SYSTEM, AND OTHERS
  6. The starfish gastrula develops into a
    free-moving ____ which then undergoes the
    process of _____ into an adult.
    larva, gastrula
  7. A population's _____ _____ is an intrinsic factor that tends to increase population growth.
    biotic potential
  8. ______ ______ is an extrinsic factor that tends to reduce the growth rate of the population.
    Environmental resistance
  9. Give some examples of density-independent factors that affect population size.
    weather condition, natural disasters: fire, flood, hurricane, tornado
  10. Small populations are affected (more than/less than/ the same as) large populations by density-dependent factors that affect population size.
    less than
  11. Give some examples of density-dependent factors that affect population size.
    predation, competition (for food, space, mates, etc.), disease
  12. What is carrying capacity?
    Maximum population size that can be sustained in a given environment
  13. The difference between the carrying capacities of the two populations of paramecia was due to _______ __ ____ ______.
    differences in food supply
  14. What is symbiosis?
    Living together in close association
  15. Describe mutualism
    • Organism 1 +
    • Organism 2 +
  16. Describe commensalism
    • Organism 1 +
    • Organism 2 0
  17. Describe parasitism
    • Organism 1 +
    • Organism 2 -
  18. Give 2 examples of mutualism
    • Anemones/zooxanthellae,
    • paramecia/zoochlorellae, lichens, and others
  19. Give 2 examples of commensalism
    • Barnacles on
    • mollusk shell, barnacles on whales
  20. Give some examples of ectoparasites
    flea, tick, leech
  21. Give some examples of endoparasites
    tapeworm, roundworm
  22. The relationship between the sea anemone and the zooxanthellae can be described as (mutualistic/commensalistic/parasitic).
    mutualistic
  23. How did the bleached anemones differ from the non-bleached anemones?
    pollution, changes in temperature (global warming)
  24. What is a simulation?
    A model that allows us to reconstruct a natural situation to better understand its components
  25. Which characteristic of the prey items was responsible for the differential succes of the predator in the different habitats?
    color
  26. What is a generalist predator?
    Can utilize a wide variety of resources
  27. What is a specialist predator?
    Can utilize one or a few types of resources
  28. How might factors such as specialization and competition affect the rate at which a predator can collect prey items?
    Should slow down the rate of foraging
  29. When the predator had "red vision" and the orange prey were toxic, what role did mimicry play in determining the types of prety items taken?
    Those prety that resembled (mimicked) orange (red and yellow) should be most avoided
  30. What are the six kingdoms of life?
    bacteria, achaea, protista, plantae, fungi, animalia

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