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5 Written questions

5 Matching questions

  1. Food chains are sometimes short because

    most producers are inedible.
    most of the energy in a trophic level is lost as it passes to the next higher level.
    predator species tend to be less diverse and less abundant than prey species.
    local extinction of a species causes extinction of the other species in its food chain.
    only a single species of herbivore feeds on each plant species.
  2. Based on current growth rates, Earth's human population in 2012 will be closest to

    10 billion.
    2 million.
    7 billion.
    3 billion.
    4 billion.
  3. Which of the following has the greatest effect on the rate of chemical cycling in an ecosystem?

    the production efficiency of the ecosystem's consumers
    the trophic efficiency of the ecosystem
    the location of the nutrient reservoirs in the ecosystem
    the rate of decomposition in the ecosystem
    the ecosystem's rate of primary production
  4. In mammals, the eardrum transmits sound waves to three small bones, which transmit the waves to fluid waves within the cochlea. Where are the three small bones located?

    Middle ear
    Outer ear
    Inner ear
  5. Select the correct statement(s) about the transfer of food energy up the trophic levels from its source in autotrophs.
    Select all that apply.

    Few plants have adaptations to reduce feeding by herbivores.
    The length of a food chain is limited by the inefficiency of energy transfer along the chain.
    An organism feeds at only one trophic level.
  1. a the rate of decomposition in the ecosystem
  2. b The length of a food chain is limited by the inefficiency of energy transfer along the chain
  3. c most of the energy in a trophic level is lost as it passes to the next higher level.
  4. d Middle ear
  5. e 7 billion.

5 Multiple choice questions

  1. bind with troponin, changing its shape so that the myosin-binding sites on actin are exposed.
  2. population growth is zero when N equals K.
  3. two species that have exactly the same niche cannot coexist in a community.
  4. tropical rain forest
  5. vegetation demonstrating vertical layering

5 True/False questions

  1. Which statement accurately describes the potential effects of disturbance on species diversity?

    Moderate levels of disturbance generally act to reduce species diversity within a community.
    In many biomes, periodic disturbances may eliminate the dominant plants.
    Many species are well adapted to survive periodic disturbances.
    Many species are well adapted to survive periodic disturbances.

          

  2. Plasma membranes of adjacent cardiac muscle cells interlock at specialized regions called intercalated disks. What is the significance of this feature of cardiac muscles?

    The intercalated disks play the same role as striations of skeletal muscle.
    The intercalated disks generate action potentials within the heart muscle without nervous system input.
    The intercalated disks allow coordinated contraction of the whole heart.
    The intercalated disks allow coordinated contraction of the whole heart.

          

  3. Which of the following sensory receptors is incorrectly paired with its category?

    rod-electromagnetic receptor
    taste receptor-chemoreceptor
    muscle spindle-mechanoreceptor
    olfactory receptor-electromagnetic receptor
    hair cell-mechanoreceptor
    zooplankton-primary producer

          

  4. Sensory pathways have four basic functions: sensory reception, transduction, transmission, and perception. How do these functions differ between yourself and a star-nosed mole?
    Select all that apply.
    Select all that apply.
    The perception of sensory input by humans and star-nosed moles differs.
    The mechanism by which the energy of a sensory stimulus is transduced into a receptor potential differs between humans and star-nosed moles.
    The number and type of sensory receptors in humans and star-nosed moles differ.
    Mechanoreceptors detect sound.
    Foods taste spicy when they activate the same sensory receptors that high temperatures activate.

          

  5. A recent study of ecological footprints concluded that

    it is not possible for technological improvements to increase Earth's carrying capacity for humans.
    the ecological footprint of the United States is large because per capita resource use is high.
    Earth's carrying capacity would increase if per capita meat consumption increased.
    current demand by industrialized countries for resources is much smaller than the ecological footprint of those countries.
    Earth's carrying capacity for humans is about 10 billion.
    two species that have exactly the same niche cannot coexist in a community.

          

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