Question 2 Multiple Choice Worth 1 points) Pierre is using a circuit-learning schedule to study for his science test on the solar system. He studies all his material every
night leading up to the test. Pierre gets an A on the test. How could he be more efficient in his circuit-learning schedule?
O Alternate what he studies every other night.
Study each night but chunk the material he studies.
O Study everything but use a morning and evening schedule.
O Take out what he already knows and study the rest.
Question 3 Multiple Choice Worth 1 points)
Question 1 (Answered)
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Secondary succession would most likely be taking place in a(n)

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.

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat