Forest logging removes trees, leaving behind only smaller bushes. Some rats in a depleted forest have an allele that makes them smaller than normal rats. It is easier
for the small rats to hide from predators in the bushes.
a) Give two reasons that the rat population is norat Hardy Weinberg equilibrium
b) Which type of rat is selected for in this ecosystem? c) how will the allele frequency change in the rat population d) is this an example of natural selection? Explain. e) has genetic diversity helped or hurt the survival of the rat population? Explain

What type of lipids are found in all biological membranes?

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area