The Biocultural Connection in this chapter explores the prevalence of plastic surgery among those of East Asian descent as they seek to alter their phenotypic appearance. What type of phenotypic characteristic do they seek to change?

a. epicanthic eye fold
b. small feet
c. shape of the nose
d. polytypic cheekbones

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Support mangrove trees out of the water. a) pneumatophores b) prop roots c) sand dunes d) tide supports

Whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.