"First, homework from last lesson on
genetic diseases, in on my desk, please."
"Second, I want to talk about your midterm. I'm going to be setting you an essay question on evolution and adaption."
Written on the board is:
Give several examples of the way in which primate characteristics have changed over time in response to selective pressures. Which characters are easy to explain with reference to function?"You have until Monday, March 20th to hand it in," Daniel continues. "This will be accounting for thirty-five percent of your total grade. I'm not going to set either a maxiumum or minimum word limit, but I'd suggest that it's at least 1,500 words."
[[ooc: omg you totally don't have to write this!]]"Now. Moving on to human biological adaptability.
The human body readily responds to changing environmental stresses in a variety of biological and cultural ways. We can acclimatize to a wide range of temperature and humidity. When traveling to high altitudes, our bodies adjust so that our cells still receive sufficient oxygen. We also are constantly responding in physiological ways to internal and external stresses such as bacterial and viral infections, smog, dietary imbalance, and overcrowding.
This ability to rapidly adapt to varying environmental conditions has made it possible for us to survive in most regions of the world. We live successfully in humid tropical forests, harsh deserts, arctic wastelands, and even densely populated cities with heavy pollution. Most other animal and plant species are restricted to one or relatively few environments by their more limited adaptability.
Humans normally respond to environmental stresses in four ways:
1. genetic change
2. developmental adjustment
3. acclimatization
4. cultural practices and technology
The first three are biological responses. The last three occur during our lifetime without further genetic change.
I want to discuss what each of these responses involve, and also,
how our body has adapted, or
could adapt to specific stresses.
Thank you, and have a great break."