99%(88)87 out of 88 people found this document helpful
This preview shows page 11 - 17 out of 23 pages.
Question 19 of 40 0.0/ 5.0 Points Ecologists who study the way many species interact with each other in a specified area are focused on: A. habitats. B. communities. C. niches. D. biomes. Question 20 of 40 5.0/ 5.0 Points On the pH scale ranging from 1 to 14, 7 is neutral. Any number greater than 7 is alkaline; any number lower than 7 is acidic. With that in mind, in turns out that the oceans are serving as a carbon sink. About __________ percent of current carbon dioxide emissions have been absorbed into the oceans.
Part 2 of 2 - 80.0/ 100.0 Points Question 21 of 40 5.0/ 5.0 Points In a growing population, the rate of natural increase equals the birth rate minus the death rate in addition to net:
Question 22 of 40 0.0/ 5.0 Points In the United States, demographically speaking, the rate of natural increase is currently below replacement but the population is growing due to: Question 23 of 40 5.0/ 5.0 Points Infant mortality is defined as the percentage of infants who die within __________ after birth in a given population per 1,000 live births per year. A. 1 month B. 3 months
C. 6 months D. 12 months Question 24 of 40 0.0/ 5.0 Points In the context of evaluating Malthus’ theory, it turns out that as the standard of living increases: Question 25 of 40 5.0/ 5.0 Points An age pyramid provides historical information about a population. That information includes all of the following EXCEPT:
Question 26 of 40 5.0/ 5.0 Points The standard symbol for carrying capacity is: Question 27 of 40 5.0/ 5.0 Points The proportion of males to females in a given population is referred to as the __________ ratio.