When do the first internal changes take place to signal the start of puberty?

_________ orgasmic difficulties occur when a woman is able to reach orgasm in some situations but not in others

Answer:

According to Darwinian principles of evolution, what are the three distinct products that are thought to result from the variant trait, or natural selection, process?

a) Inclusive fitness, reciprocal altruism, and parental investment b) Adaptations, by-products, and noise c) SNPs, QTLs, and HapMaps d) Phenotypes, genotypes, and epigenetics