2B. A species that exerts an influence on a community that is much greater than

Question

2B. A species that exerts an influence on a community that is much greater than expecteid bsed its abundance, is called a(m) a primary produces b. ecosystem engineer c. keystone species d. successional species e transformational species. 29. Mutualistic interactions are most likely to evolve where resources are a limited b. abundant c. provided by humans d. not present at all e. none of the above 30. Which of the following traits is NOT an adaptation of plants for seed dispersal by frugvores (fruit-eating animals)? a. bright colors of ripe fruit b. bitter taste of unripe fruit c. thick endocarp of the ovary d. tiny seeds with papery "wings e. small seeds with acid-resistant seed coats 31. A species-area relationship can be used by ecologists to a measure the reproductive rate of a particular species in a given area. b. examine how human populations are growing c. estimate the number of species extinctions that might result from habitat destruction. d. produce a population model for a specific species e. determine the lifespan and age-structure distribution of species in an area : 32. A plant species is more likely to become invasive if it has a. a long generation time. b. a native habitat with similar predators as what exists in the area to which it is introduced c. large seeds. d. a slow rate of growth. e. easy means of vegetative propagation 33. One strategy to reduce the effect of habitat fragmentation is a. combining different species in one preserve b. rotating position of preserves to keep species from getting too acclimated to one spot c. building corridors that permit safe travel of individuals between d. mate-swapping to increase genetic diversity among populations e. build wind screens around the smaller preserves preserves 34. Biodiversity includes all of the following measures EXCEPT . a. number of species b. number of organisms of each species c. ages of organisms within each population d. genetic variation within each population

Explanation / Answer

28. c. keystone species

29. b. abundant

30. d. tiny seeds with papery wings.

This method is used for dispersal by wind

31. c. estimate the number of species extinctions that might result from habitat destruction

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