Henry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached?

gene flow greatly affects small populations, but large populations can recover.
genetic drift greatly affects small populations, but large populations can recover.
gene flow greatly affects large populations, but small populations can recover.
genetic drift greatly affects large populations, but small populations can recover.

The correct answer would be Genetic drift greatly affects small populations, but large populations can recover.

Genetic variation is one of the mechanisms of evolution due to which the allellic frequency of a population changes as a result of random sampling of the organisms.

It may result in the loss of the genetic variation or alleles in a population.

Its results are maximum when the population size is small as they are more susceptible to the random changes.

In addition, its effects are increased when the population size is adversely reduced due to a natural disaster.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.