Evolution by Natural Selection Quiz
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the process by which individuals with favorable variations are more likely to survive and reproduce?

  • Artificial Selection
  • Natural Selection (correct)
  • Species Evolution
  • Genetic Variation

    • What happens to the percentage of individuals showing favorable variations over time?

  • It remains constant
  • It decreases
  • It fluctuates randomly
  • It increases (correct)

    • What is the estimated percentage of species that have gone extinct?

  • 70-80%
  • 99-100%
  • 98-99% (correct)
  • 50-60%

    • What is the process by which a new species emerges from a previously existing species?

    <p>Speciation</p> Signup and view all the answers

    What is the result of a species dividing into two isolated subpopulations?

    <p>Speciation</p> Signup and view all the answers

    What is the concept that two or more species can reciprocally influence the evolutionary direction of the other?

    <p>Coevolution</p> Signup and view all the answers

    What percentage of energy is lost as heat when moving from one trophic level to the next?

    <p>90%</p> Signup and view all the answers

    Why is biomass used as a proxy in measuring energy in ecosystems?

    <p>Because it is difficult to measure the amount of energy contained in each trophic level</p> Signup and view all the answers

    What is a food web?

    <p>A series of multiple, overlapping food chains</p> Signup and view all the answers

    What is the byproduct of photosynthesis in plants?

    <p>Oxygen</p> Signup and view all the answers

    What process do decomposers use to recycle organic molecules?

    <p>Respiration</p> Signup and view all the answers

    What is the primary function of herbivores in the carbon cycle?

    <p>To break down complex organic molecules into simpler molecular building blocks</p> Signup and view all the answers

    What is a possible way for a species to become extinct suddenly?

    <p>Toxic pollution rendering its entire habitat unlivable</p> Signup and view all the answers

    What is the result of coevolutionary relationships between different species?

    <p>Each party exerts selective pressures on the other</p> Signup and view all the answers

    What is a characteristic of prey adaptation in response to predation?

    <p>Higher reproduction rate</p> Signup and view all the answers

    Which of the following is an example of a coevolutionary relationship?

    <p>Grazing animals and grass species</p> Signup and view all the answers

    What is the result of one species being extirpated from a region?

    <p>The species is removed from the local ecosystem</p> Signup and view all the answers

    What is an example of a local species at risk in Oman?

    <p>Arabian Oryx</p> Signup and view all the answers

    What is a consequence of an increase in the number of plants and algae?

    <p>The creation of 'dead zones'</p> Signup and view all the answers

    What is the ultimate source of phosphorus atoms?

    <p>Rock</p> Signup and view all the answers

    Why do animals gain necessary phosphorus?

    <p>From consuming plants or other animals</p> Signup and view all the answers

    What happens when too much nitrogen or phosphorus is applied as fertilizer?

    <p>The growth rate of bacteria, algae, and aquatic plants increases</p> Signup and view all the answers

    What is released into the atmosphere when fossil fuels are burned?

    <p>Carbon dioxide</p> Signup and view all the answers

    What happens to the amount of carbon dioxide in the atmosphere when forests are converted to agricultural land?

    <p>It increases</p> Signup and view all the answers

    What is the primary function of carbon sinks?

    <p>To remove carbon atoms from the active, short-term nutrient cycle</p> Signup and view all the answers

    What is the result of converting forests to agricultural land?

    <p>An increase in the amount of carbon dioxide in the atmosphere</p> Signup and view all the answers

    What is the role of nitrogen-fixing bacteria in the nitrogen cycle?

    <p>To convert nitrogen gas into ammonia</p> Signup and view all the answers

    What is the primary sink for nitrogen?

    <p>The atmosphere</p> Signup and view all the answers

    What is the result of excessive fertilizer application in aquatic ecosystems?

    <p>An increase in the growth rate of bacteria, algae, and aquatic plants</p> Signup and view all the answers

    What is the function of denitrifying bacteria in the nitrogen cycle?

    <p>To convert nitrite to nitrogen gas</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser