15. Which of the following is NOT one of the ways that a lake can form?
a. A stream cuts off a meander to leave an isolated channel of water.
b. Ocean waters recede to lower-lying areas.
C. Cirques high in the mountains fill with water.
d. Eutrophication causes a bog to become flooded.

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england