What are the two aspects of self-regulation?

A paradoxical characteristic of children with Williams syndrome is that they ____

a. seem mentally disabled during childhood but develop into above average intelligence adults b. can write, but cannot read what they just finished writing c. show a better memory after a delay than they show immediately after an event has occurred d. have very large vocabularies, but cannot learn simple skills

Darwin drew upon the proposition of Malthus that ___________.

a. among species, those that compete ably are most likely to survive b. more people are born than is food produced (that the number of people reaches a level that the environmental resources cannot support) but a balance is maintained by nature c. species appear to be perfectly adapted to their environment d. populations increase arithmetically and food supplies increase geometrically