18 POINTS ! Urban sprawl occurs when
a. cities spread out into the existing countryside
b. cities extend upward
c. people leave cities to live in rural areas
d. none of the above

Aseries of connections of food chain in an ecosystem is called a what

Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geological equipment to analyze the composition of rock?

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii