By Michael D. Johnson
For classes in human biology
Explore Human Biology when it comes to present concerns, within the textual content and Online.
Through his educating, his textbook, and his on-line weblog, award-winning instructor Michael D. Johnson sparks curiosity in human biology via connecting easy biology to real-world concerns which are appropriate on your existence. Using a storytelling method and broad on-line help, Human Biology: strategies and present concerns Eighth version not simply demystifies how the human physique works but in addition drives you to turn into a greater, extra discerning patron of healthiness and technological know-how info. Each bankruptcy opens with Johnson’s well known “Current concerns” essays, and inside every one chapter, “BlogInFocus” references direct readers to his frequently-updated weblog for breaking human biology-related information.
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MasteringBiology is an internet homework, instructional, and overview product confirmed to enhance effects through aiding you to quick grasp options. make the most of possibilities to perform uncomplicated technological know-how literacy talents, utilizing interactive assets that create attractive studying reviews. potent actions in MasteringBiology support extra visualize and comprehend advanced organic processes.
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Extra resources for Human Biology. Concepts and Current Issues
Explain. The defining features of humans Humans are not the largest animal, nor the fastest or strongest. Our eyesight and hearing are not the best. We can’t fly, we swim poorly, and we don’t dig holes in the ground very well with our hands. Nevertheless we possess several features that, taken together, define how we are different from other organisms and explain how we have managed to survive for so long: ■ MJ’s Human Biology Blog Thimerosal and Autism The results of a study by researchers at the Department of Public Health in California do not support the hypothesis that autism is caused by thimerosal, a preservative containing ethylmercury that was once used in childhood vaccines.
If thimerosal were responsible for causing autism there should have been a sharp decline in new cases of autism after 2004. The new findings and a commentary about them are published in The Archives of General Psychiatry. It is doubtful, however, that the study will do much to reassure parents, some of whom continue to believe passionately that their child’s autism was a direct consequence of childhood vaccinations despite research findings to the contrary. Reference: Fombonne, Eric. Thimerosal Disappears but Autism Remains.
Suppose that instead of randomly assigning subjects to the two groups, subjects with high blood pressure are more likely to be put in the experimental group. Would this be a better or a worse experiment, or would it make no difference? Explain. 14 ■ ■ ■ Chapter 1 Human Biology, Science, and Society Randomly divide the larger pool of subjects into two groups. Designate one the experimental group and the other the control group. The importance of random assignment to the two groups is that all other factors that might affect the outcome (such as age or gender differences in responsiveness to the drug, or other previous health problems) are automatically equalized between the two groups.
Human Biology. Concepts and Current Issues by Michael D. Johnson