Question 1
In natural communities, some feedback mechanisms operate whenever populations change in size; they are
◦ density-dependent factors.
◦ density-independent factors.
◦ always within the individuals of the community.
◦ always outside the individuals of the community.
◦ the same as genetic drift.
Question 2
In some areas, rapid population growth and poverty cause the poor to
◦ cut forests.
◦ grow crops on marginal land.
◦ overgraze grasslands.
◦ poach endangered animals.
◦ all of these.