Which phrases describe both lakes and ponds? Check all that apply.
1. contain still, standing fresh water
2. have no plants growing at the bottom
3. formed by rainfall, melted snow and ice, or runoff
4. formed by lava or mud blocking a river
5. created by building a dam on a river
6. are shallow enough that sunlight reaches the bottom

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: