Biology multiple choice questions | Biology homework help

1. Which of the following is part of the abiotic environment of an organism? (Points: 5)







2. Decomposers: (Points: 5)

        are unimportant links in a food web.

        recycle organic to inorganic compounds.

        cause disease and destruction.

        require a source of light energy.



3. Most of the processes that influence the hydrologic cycle are: (Points: 5)

        biological processes.

        physical processes.

        ecosystem processes.

        wind processes.



4. In the carbon cycle, the two primary processes that remove and add carbon dioxide to the atmosphere are: (Points: 5)

        predation and parasitism.

        carnivores and herbivores.

        sunlight and photosynthesis.

        respiration and photosynthesis.



5. __________ convert nitrogen gas to nitrogen that plants can use. (Points: 5)


        Nitrogen-fixing bacteria

        Nitrifying bacteria

        Denitrifying bacteria



6. What an animal uses for food is part of its: (Points: 5)




        None of these answers is correct.



7. Species A and species B both benefit by living together. This is an example of: (Points: 5)







8. The biome with the fewest seasonal changes is the: (Points: 5)

        temperate deciduous forest.


        tropical rain forest.

        boreal coniferous forest.



9. If a forest fire destroys a region of the forest, then a: (Points: 5)

        secondary succession will occur.

        primary succession will occur.

        climax community is present in the burned area.

        None of these answers is correct.



10. If an animal cannot digest a chemical but is able to pass out all of that chemical as waste material, there is: (Points: 5)



        no parasitism.

        no biomagnification.



11. Gene flow is: (Points: 5)

        used for comparison purposes when numbers of organisms or size of organisms would lead to confusion.

        the optimum number of individuals of a species that can survive.

        the movement of genes within a population from place to place resulting from migration.

        the graphic expression of increasing or decreasing numbers.



12. A population does not change in size during the __________ phase. (Points: 5)



        stable equilibrium

        None of these answers is correct.



13. When a limiting factor becomes more important as the size of the population increases, it is known as: (Points: 5)

        a biotic potential.

        a density-independent factor.

        a density-dependent factor.

        an intrinsic factor.



14. The carrying capacity of an area for a plant is most likely maintained by: (Points: 5)

        the accumulation of waste products.

        the availability of raw material and energy.

        a constant birthrate.

        a low biotic potential.



15. The carrying capacity of an area can be reduced if there is too much: (Points: 5)


        raw material.


        All of these answers are true.



16. Instinct differs from learned behavior in that instinctive behavior: (Points: 5)

        does not change; learned behavior does.

        is acquired; learned behavior is genetic.

        is adaptive; learned behavior is not.

        All of these answers are true.



17. Insight learning will help: (Points: 5)

        a wolf learn imprinting.

        protect an insect from being eaten by a bird.

        teach a bird how to fly.

        a student select the correct answers on an exam.



18. Territorial behavior always involves: (Points: 5)

        communication between members of the same species.

        huge investments in time and energy.

        courtship behavior.

        All of these answers are true.



19. __________ is a method of ranking individuals from highest to lowest. (Points: 5)


        Territorial behavior analysis

        A dominance hierarchy




20. Behavior in which an individual animal gives up an advantage or puts itself in danger to aids others is called: (Points: 5)


        altruistic behavior.

        observational learning.