What condition may result if the lower esophageal sphincter is not closed tight enough after eating? ?

Why does the skin of your finger shrink when you wash clothes for a long time?

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim