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Chris M.
Chris M., M.S.W. Social Work
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1. Locally adapted and genetically distinctive populations within a species are referred to as: (Points: 5)







2. Within a population, if the average is selected for and the two opposing extremes are selected against, this is an example of: (Points: 5)

        directional selection.

        disruptive selection.

        stabilizing selection.

        natural selection.



3. Over time, average phenotypes become less common and the population becomes phenotypically more diverse as a result of __________ selection. (Points: 5)







4. Molecular biology has helped scientists examine the genetics and evolution of different species. Which of the following sequences is correctly ordered? (Points: 5)

        Restriction fragments, restriction enzymes, PCR, electrophoresis

        PCR, restriction enzymes, restriction fragments, electrophoresis

        Restriction enzymes, PCR, electrophoresis, restriction fragments

        PCR, electrophoresis, restriction enzymes, restriction fragments



5. All of the following conditions are included in the Hardy–Weinberg equilibrium principle except: (Points: 5)

        no mutation.

        non-random mating.

        large population size.

        no immigration.



6. __________ is/are defined as a group of potentially breeding organisms within a species in a given space and time. (Points: 5)







7. Whittaker's research on North American tree distribution examined __________ gradients and concluded that the tree distribution was __________. (Points: 5)

        temperature; random

        temperature; clumped

        moisture; clumped

        moisture; random



8. In order to determine whether a species is common or rare, ecologists use all of the following criteria EXCEPT: (Points: 5)

        habitat tolerance.

        evolutionary existence.

        geographical range.

        local population size.



9. The rarest animal is the __________ and the rarest plant is the __________. (Points: 5)

        Northern spotted owl; Pacific Yew

        Siberian tiger; Asplenium septrionale

        Tasmanian devil; Welwitschia

        Mountain gorilla; Prichardia Monroe



10. Rarity I can be described by the following indicators: (Points: 5)

        restricted range, narrow habitat tolerances, and small local populations.

        restricted range, broad habitat tolerances, and large local populations.

        extensive range, narrow habitat tolerances, and large local populations.

        extensive range, broad habitat tolerances, and small local populations.



11. Which of the following word pairs are mismatched? (Points: 5)

        Random distribution: aggressive interaction

        Clumped distribution: attraction to a common source

        Regular distribution: antagonistic behaviors

        Large scale distribution: substantial environmental changes



12. Which of the following is mismatched? (Points: 5)

        Eastern grey kangaroo: temperate and tropical forest

        Western grey kangaroo: little seasonal variation in precipitation

        Red kangaroo: savanna and desert

        Western kangaroo: temperate woodland and shrubland



13. The Type I survivorship curve indicates: (Points: 5)

        low juvenile mortality and high mortality in older adults.

        high juvenile mortality and low mortality in older adults.

        low juvenile mortality and low mortality in older adults.

        high juvenile mortality and high mortality in older adults.



14. Humans would best be represented by which of the following survivorships curves? (Points: 5)







15. The age distribution of a population can reveal: (Points: 5)

        growth potential.



        growth potential, survivorship, and reproduction.



16. A group of subpopulations living in spatially isolated patches connected by exchange of individuals among patches is called a(n): (Points: 5)







17. Which of the following indicates a population in decline? (Points: 5)




        R0= - 0.601



18. Out of 1 million eggs laid by a mackerel, more than 999,990 die during the first 70 days of life either as eggs, larvae, or juveniles. The mackerel has a __________ survivorship curve. (Points: 5)

        Type I

        Type II

        Type III

        Type IV



19. Which of the following equations bests represents the per capita rate of increase? (Points: 5)

        r = T/(ln R0)

        r = (ln R0)/T

        l = Nt/( Nt+1)

        l = (Nt+1)/Nt



20. Type II survivorship curve indicates: (Points: 5)

        low juvenile mortality and high mortality in older adults.

        high juvenile mortality and low mortality in older adults.

        low juvenile mortality and low mortality in older adults.

        equal chance of dying at any age. 


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