Why is genetic drift undesirable in a population?
a) a small population is less likely to survive than a large population
b) harmful alleles may be formed by mutation in the new population
c) a population with little variation is less likely to survive if the environment changes
d) the bottleneck effect may cause destructive events to occur in the population

Which direction does the energy flow in this energy pyramid ?

What form of anesthetic was used for field surgery

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases