Study

Unit 2

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  • True or false organisms within a population must compete for biotic and abiotic factors?
    true
  • what happens if an ecosystem is left alone
    a balance will eventually return
  • which of these pairs of organisms are competing for the same food?
    fresh water snails and small fish
  • Without bacteria, nothing else on Earth could live. This is primarily true because of the role they play in _________________.
    decomposition
  • A particular area can support a finite number of organisms. When the number of a species goes beyond what an area can support, it is called ________.
    overpopulation
  • What term is used to describe a group of rabbits of the same species that live together in the same forest at the same time?
    population
  • do we depend on relationships to help us thrieve in our envirment?
    yes
  • what is a population
    a group of organisms of the same species that live in the same area.
  • You can usually tell something about what a mammal eats by looking at its teeth. Which of these describes the teeth that herbivores usually have?
    large, sharp incisors and large molars, small or no cannies.
  • Which cactus feature is an adaptation that protects it from predators?
    spines (needles)
  • Camouflage is an adaptation that can be useful to _____________________.
    both predators and prey
  • what do scientists call it when animals of the same species compete for resources.
    intraspecific competition
  • What components make up an environment?
    abiotic and biotic factors
  • Herbivores belong in which trophic level of the energy pyramid?
    primary consumers
  • When a species becomes overpopulated in a particular ecosystem, typically, some individuals will survive, some will die, and some will _______.
    migrate
  • Which statement best describes humans?
    Humans and omnivors
  • Identify the true statement.
    mammals are consumers
  • How do humans frequently affect biotic and abiotic factors in ecosystems
    by cutting down trees in a forest or by polluting water in a lake
  • Monarch butterflies are poisonous and viceroy butterflies are not, yet they look very similar. Which of these statements describes this situation?
    viceroy evolution resulted in mimicry of monarchs
  • In which zone would you find animals, but no plants or algae?
    Abyssal zone
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