the difference between a population being resistant to a disease and an individual being immune to a disease
- 5.9 Explain the difference between a population being resistant to a disease and an individual being immune to a disease. How do these two states (population resistance and individual immunity) develop under natural conditions (think about humans not having modern medical practices or about a wild animal population).
- 5.10Study infographic 19.8. This is actually a phylogenetic tree in which each bar represents the time that we have evidence for a given species existing on the planet. Denisovans are not illustrated, but we have evidence they existed between 90,000 and 30,000 years ago. Explain why the bars in this illustration are not connected into a phylogenetic tree that looks more like infographic 15.7 (and other you have seen in your textbook).
- 5.11This statement from Wikipedia gives a brief description of human populations who have not had contact with modern society. This is a reasonable description of what is known about uncontested “tribes” of humans today.
- “In 2013, it was estimated that there were more than 100 uncontested tribes
