Both low birth and death rates characterize the demographic transition. Which factors will lower birth and death rates for twenty-first century Homo sapiens?
What will be an ideal response?
The best answers should include a discussion of cultural and societal factors that control population. For example birth control (family planning) is essential. But how do you motivate people to plan families? Students should discuss the importance of good jobs, a livable income, raising the status of women, and education for both adults and children (children should not be economic assets as they are in lesser developed countries). How do we decrease death rates? By improving medical care, sanitation, and disease control.
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The presence of lipid A in the outer membranes of Gram-Negative bacteria:
A) Affects the formation of blood clots in the host B) Causes these bacteria to be oxidase positive C) Triggers the secretion of a protease enzyme to cleave IgA in mucus D) Enables enteric bacteria to ferment glucose anaerobically
The movement of substances to regions of lower concentration is called
A. active transport. B. diffusion. C. pinocytosis. D. pumping. E. exocytosis.
What is present in both the light-dependent and light-independent reactions?
a. ATP b. oxygen c. glucose d. rubisco e. water
In early evolutionary history, primitive fishes
had lungs that eventually evolved into the lungs of terrestrial organisms and the gas bladders of modern fishes who use gills, not lungs, for oxygen/ carbon dioxide gas exchange. This is an example of
a. adaptive radiation. b. exaptation. c. sympatric speciation. d. allopatric speciation. e. temporal isolation