A population of cottontail rabbits feeds on grass located at the bottom of a cliff. A loose boulder at the top falls and kills a large portion of the rabbit population randomly. How will this affect the subsequent generations of cottontail rabbits in this population? 1.The cottontails that survived will reproduce and be able to better avoid large boulders 2.The subsequent generations will be less diverse than the original population 3.The population will find another food source to avoid injury from environmental factors 4.Cottontail rabbits will likely go extinct due to their feeding patterns

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.